4 letters:
corp

5 letters:
acean, ation, corp.

6 letters:
-acean, -ation, aition, cation, dation, hatian, kation, latian, lation, mation, nation, ration, sation

7 letters:
alation, aration, baishan, boation, caishen, elation, enation, gratian, haitian, haitien, hiation, imation, iration, isation, ization, oration, ovation, piation, station, taishan, xlation

8 letters:
-isation, -ization, a-ration, ablation, acuation, adnation, aeration, agnation, alsatian, alsation, amratian, aquation, assation, aviacion, aviation, b-ration, bination, c-ration, celation, cenation, cetacean, cibation, citation, colation, conation, creation, croatian, cubation, cumacean, curation, debation, delation, deration, dilation, ditation, donatien, donation, dotation, duration, ennation, eolation, erration, estacion, fetation, fication, fixation, friation, galatian, gelation, gyration, halation, himation, horatian, humation, ideation, illation, iodation, jobation, juration, k-ration, lavation, laxation, legation, levation, libation, ligation, limation, lobation, location, lunation, lusatian, lutation, luxation, manation, moration, motation, mutation, namation, natation, negation, nidation, nivation, nodation, notation, novatian, novation, nudation, nugation, nunation, nutation, oblation, optation, orbation, pacation, potation, pupation, relation, rhyacian, rixation, rogation, roration, rotation, sanation, sedation, solation, sonation, sudation, taxation, thracian, updation, vacation, velation, venation, vexation, vocation, volation, votation, zonation

9 letters:
-fication, actuation, acylation, adoration, adulation, adunation, afflation, agflation, agitation, alutation, amidation, amination, animation, arctation, arcuation, arenation, avigation, avocation, avolation, biliation, bitnation, c-station, cantation, captation, carnation, caseation, cassation, caudation, causation, cessation, chelation, ciliation, clamation, coaxation, cognation, collation, coniacian, cremation, crenation, curtation, curvation, dalmatian, dalmatien, dalmation, damnation, darnation, daycation, dealation, deflation, deleation, dentation, deviation, dictation, dignation, duplation, ebonation, education, efflation, ejulation, elevation, elixation, elocation, eluxation, emanation, emication, emulation, enatation, enodation, epilation, epotation, epulation, epuration, eretation, erogation, estuation, evagation, eviration, evitation, evocation, evolation, exaration, exoration, expiation, exudation, falcation, fellation, feriation, fibration, filiation, filmation, flotation, fluxation, foetation, foliation, formation, foveation, frication, fundacion, furcation, fuscation, gemmation, gestation, glycation, gradation, grivation, gustation, guttation, hortation, hydration, hyemation, ification, imitation, inflation, inhiation, irisation, isolation, iteration, jactation, lactation, lallation, laniation, latration, laudation, libration, lineation, liquation, luctation, lurcation, mactation, mancation, mediation, mentation, migration, mimmation, mundation, mutuation, narration, nervation, neuration, nictation, nitration, nunnation, obviation, omination, oneration, operation, opination, ovulation, oxidation, oxydation, ozonation, palmation, palpation, peltation, pentation, phaeacian, phocacean, phonation, pinnation, piscation, placation, planation, plication, poblacion, precation, predacean, predation, prelation, privation, probation, prolation, pronation, proration, pulsation, purgation, quotation, radiation, reboation, reflation, reptation, ructation, ruination, runcation, sacration, saltation, salvation, sarmatian, satiation, scalation, sensation, septation, seriation, serration, siccation, signation, siltation, sinuation, situation, sortation, spiration, sputation, striation, sublation, sulcation, sulfation, summation, surgation, taliation, tardation, tarnation, tentation, testacean, testation, tetration, titration, tralation, tranation, ubication, ululation, unimation, univation, urination, vacuation, vallation, valuation, variation, vastation, vennation, vernation, vibration, viduation, violation, vitiation

10 letters:
abberation, abdication, aberration, abjuration, ablegation, abnegation, abnodation, abrogation, accubation, accusation, acervation, acieration, activation, adaptation, adequation, adjuration, adlegation, admiration, adornation, adrogation, advocation, affixation, aggeration, agregation, albication, alienation, alineation, alkylation, allegation, alligation, allocation, alteration, ambulation, ampliation, amputation, angulation, anhelation, annexation, annotation, annulation, aplication, aprication, areolation, argutation, arietation, ariolation, arrogation, asperation, aspiration, assination, assocation, aucupation, auguration, aurigation, automation, autonation, aversation, awolnation, balneation, bilocation, blandation, bloviation, caligation, cameration, canulation, capitation, carination, castration, catenation, cavitation, cicuration, cineration, claymation, coaptation, cogitation, cohobation, colocation, coloration, conflation, conization, cooptation, coporation, copulation, corelation, coronation, corotation, cribration, crispation, cruciation, crustacean, crustation, cumulation, cunctation, d'aviation, datamation, deaeration, dealbation, deauration, decimation, decoration, decreation, decstation, decubation, dedication, defamation, defecation, defedation, dejeration, dekoration, delegation, delibation, deligation, deliration, denegation, denidation, denization, denotation, denudation, depilation, depuration, deputation, derivation, derogation, desolation, desudation, detonation, devitation, devocation, devoration, difflation, digitation, dilatation, dimication, disflation, diurnation, divagation, divination, domination, dubitation, eburnation, edentation, eliquation, elongation, eluctation, eluviation, emaciation, emendation, emigration, emuscation, enarration, endstation, enervation, enialation, enielation, equitation, eradiation, ereptation, eructation, escalation, estimation, estivation, etiolation, evacuation, evaluation, evulgation, exaltation, exaptation, excalation, excavation, excecation, excitation, excreation, excubation, excusation, execration, exfetation, exhalation, exhumation, exiccation, exornation, exossation, expilation, expiration, exsudation, extubation, exultation, exundation, exuviation, fabulation, farreation, fasciation, fatigation, februation, federation, feneration, figuration, filtration, flagration, flammation, flirtation, floatation, floriation, foundation, frondation, fumigation, funeration, funimation, gemination, generation, glaciation, gloriation, graduation, grassation, habitation, hebetation, herniation, hesitation, i-mutation, ignoration, illutation, imigration, immanation, immolation, immutation, impanation, impuration, imputation, inaquation, inauration, incavation, inceration, inchoation, incitation, incubation, indagation, indexation, indication, induration, inescation, infixation, infucation, infumation, ingflation, inhalation, inhumation, initiation, inlagation, innovation, inondation, insolation, insulation, intimation, intonation, intubation, inundation, invination, invitation, invocation, iodination, iodisation, iodization, ionisation, ionization, irrelation, irrigation, irritation, irroration, irrumation, jaculation, jubilation, jugulation, laceration, lamination, lapidation, latitation, laureation, levigation, leviration, levitation, liberation, licitation, limitation, literation, litigation, lobulation, loculation, lorication, lumination, lustration, maceration, maculation, majoration, malaxation, malleation, marination, maturation, maximation, medication, meditation, minoration, miseration, mitigation, moderation, modulation, morulation, motivation, muneration, mutilation, nauseation, navigation, nebulation, newsnation, nidulation, nodulation, nomination, nucleation, numeration, obduration, oberration, objuration, obligacion, obligation, obturation, occecation, occupation, ocellation, oppilation, opsonation, optimation, ordination, oscitation, osculation, outstation, pabulation, pagination, palliation, pancratian, panelation, pankration, papulation, paralation, patination, patriation, peculation, pegylation, pejoration, perflation, permeation, peroration, pixelation, pixilation, plantation, plasmation, polycation, population, preciation, prensation, prestation, punctation, quartation, quassation, racemation, radication, recitation, recreation, recubation, recusation, refutation, regelation, regulation, relaxation, relegation, relevation, relocation, renegation, renovation, reparation, repedation, reputation, resonation, resudation, revelation, revocation, roboration, roc nation, rumination, sagination, salination, salivation, salutation, sanitation, saturation, scanlation, scortation, scrutation, semination, separation, seperation, sevocation, sibilation, sideration, simulation, snatiation, sonication, spallation, speciation, spectation, spoilation, spoliation, squamation, stagnation, stallation, starvation, staycation, stellation, stupration, substation, sufflation, sulphation, supination, suturation, tabulation, temeration, temptation, titivation, titubation, toleration, tolutation, toxication, trabeation, tractation, truncation, tubulation, tv station, ulceration, ultimation, undulation, urtication, ustulation, usurpation, validation, vaporation, vapulation, varication, vaxstation, vegetation, velitation, venenation, veneration, vesication, visitation, volitation, volutation, xpectation

11 letters:
abacination, abberration, ablactation, abomination, abreviation, absentation, acceptation, acclamation, acclimation, acetylation, acidulation, acumination, adfiliation, adhortation, adumbration, advermation, aerostation, aestivation, affectation, affiliation, affirmation, affrication, aggradation, aggravation, aggregation, aid station, air station, allectation, alleviation, allineation, alluviation, altercation, alternation, alveolation, amblimation, ammoniation, amplexation, analyzation, angariation, angustation, anhydration, anihilation, animutation, annhilation, anodisation, anodization, anovulation, antiquation, apocopation, apodisation, apodization, appalachian, appellation, applanation, application, apprecation, approbation, arabisation, arabization, arbitration, argentation, arrentation, arrestation, asportation, assentation, assignation, association, assoziation, astrogation, atomisation, atomization, attenuation, atterration, attestation, babestation, ballotation, balsamation, baptization, barfulation, bifurcation, bioaeration, bombilation, bombination, botheration, brachiation, brecciation, bromination, bus station, calcination, calculation, calibration, cancelation, canceration, cannulation, cap-haitien, capillation, capsulation, captivation, carbocation, carbonation, carburation, castigation, cavillation, celebration, cementation, cerebration, chemigation, chrismation, circination, circulation, citrination, co-creation, co-location, co-optation, co-relation, coadunation, coagulation, coarctation, coeducation, colligation, collimation, collocation, colouration, combination, comessation, commination, commoration, commutation, comparation, compilation, compotation, computation, concavation, concitation, condonation, confutation, congelation, conjugation, conjuration, connotation, consolacion, consolation, conurbation, convocation, cooperation, corporation, correlation, corrivation, corrugation, cortication, coruscation, covariation, crenelation, crenulation, crepitation, crimination, cruentation, culmination, cultivation, cupellation, cuspidation, cyanidation, cybernation, cyclization, deamidation, deamination, debarkation, debellation, decantation, decertation, deciduation, declamation, declaration, declination, decollation, decurtation, decussation, defaecation, defalcation, defiliation, defloration, defoedation, defoliation, deformation, degradation, degravation, degredation, degustation, dehortation, dehydration, deification, delactation, delapsation, delassation, delectation, delibration, delineation, deliquation, demarcation, demarkation, dementation, demigration, denervation, denigration, denitration, dentilation, deoxidation, deplication, deploration, deplumation, deportation, depravation, deprecation, depredation, deprivation, deraination, desecration, desiccation, designation, desperation, despumation, dessication, destination, deterration, detestation, deturbation, deturpation, deuteration, devaluation, devastation, dialyzation, dilaniation, dimidiation, diradiation, dislocation, dismutation, disputation, dissipation, divulgation, dulcoration, duplication, ecomstation, edification, effigiation, efformation, effrenation, ejaculation, elaboration, elapidation, elastration, elicitation, elimination, elinguation, elucidation, elutriation, emaceration, emaculation, embarcation, embarkation, embrocation, emmigration, encystation, endorsation, ennialation, enolization, enucleation, enumeration, enunciation, epilogation, epoxidation, eradication, erotization, evagination, evaporation, eventration, eventuation, evigilation, exacination, exagitation, examination, exanimation, exantlation, excantation, excarnation, exclamation, excoriation, exestuation, exfoliation, exhortation, exoneration, expatiation, expectation, expiscation, explanation, explication, exploration, expoliation, exportation, expugnation, expurgation, exsiccation, extenuation, extillation, extirpation, extrication, exuperation, fabrication, fascination, fecundation, fertigation, festination, fibrination, fimbriation, fissipation, fissuration, fistulation, flagitation, fluctuation, flustration, focillation, fomentation, forcipation, forestation, formication, formulation, fornication, fructuation, frustration, fulguration, fulmination, furfuration, fustigation, gallinacean, gamestation, gas station, gemmulation, geolocation, germination, glomeration, glutination, granulation, gratulation, gravidation, gravitation, groundation, gubernation, gurgitation, habituation, harioiation, hariolation, haustration, hibernation, honestation, humectation, humiliation, hybernation, hydratation, hyphenation, i-formation, idolisation, idolization, illiquation, illuviation, ilumination, imagination, imbrication, immigration, impartation, impastation, impetration, implication, imploration, importation, imprecation, improbation, impugnation, inactuation, inanimation, incantation, incarnation, incensation, inclamation, inclination, incremation, increpation, inculcation, incurvation, indentation, indignation, indorsation, inebriation, infatuation, infeodation, infestation, infeudation, inflamation, information, infurcation, infuriation, infuscation, ingannation, innervation, innidiation, inoculation, inoperation, inquination, inscenation, insectation, insiccation, insinuation, inspiration, instigation, insuccation, insultation, integration, intensation, intentation, intrication, inusitation, inviscation, iridization, irradiation, itemisation, itemization, itineration, jactitation, judaization, jumpstation, kombination, laciniation, lacrimation, lacrymation, laicisation, laicization, lamellation, lamentation, lancination, lapillation, legislation, lionisation, lionization, liquidation, lixiviation, lubrication, lucubration, luxuriation, lyonisation, lyonization, machination, malrotation, mamillation, mancipation, manducation, margination, marmoration, mastication, materiation, medullation, melioration, memoization, mendication, menostation, menstration, mensuration, mercuration, methanation, methylation, metrication, micronation, miscitation, miscreation, mislocation, misrelation, molestation, monstration, mordication, morsitation, mouillation, mucronation, murmuration, musculation, mussitation, myelination, negotiation, nervuration, neurulation, nextstation, nictitation, nitrosation, nummulation, nuncupation, nundination, nutrication, obfirmation, obfuscation, objurgation, oblatration, oblectation, obliquation, obluctation, obscuration, obsecration, observation, obsignation, obstination, obstipation, obtestation, obtundation, obumbration, occultation, oestruation, officiation, offuscation, opitulation, oppugnation, orientation, origination, oscillation, ostentation, oxidisation, oxidization, oxygenation, ozonization, painstation, palpitation, parentation, passivation, pay-station, pectination, penetration, peptisation, peptization, peragration, percolation, perduration, perennation, pererration, perforation, permutation, perpotation, personation, pestilation, pignoration, pixellation, pixillation, playstation, pollenation, pollination, polystation, ponctuation, ponderation, postulation, predication, prefixation, prelibation, prenylation, preparation, procreation, procuration, profanation, promanation, propagation, properation, propination, prorogation, prostration, protonation, provocation, proximation, publication, pullulation, punctuation, pustulation, quiritation, raumstation, re-creation, realisation, realization, reanimation, recantation, reclamation, reclination, recordation, recurvation, reeducation, reformation, refrenation, refrication, rehydration, reification, reinstation, reiteration, reluctation, remediation, remigration, reoperation, reoxidation, replication, repudiation, reradiation, reservation, resignation, respiration, restoration, retaliation, retardation, revaluation, rubrication, rustication, sacculation, sarculation, satisdation, saudization, secundation, segregation, serrulation, soliitation, solmisation, solmization, spatulation, speculation, spiculation, sporulation, squassation, stabulation, stagflation, stimulation, stipulation, stylisation, stylization, subarration, subjugation, sublevation, subligation, sublimation, subluxation, subnotation, subornation, subrogation, subundation, suffixation, suffocation, sulfonation, superlation, suppuration, supputation, surculation, surrogation, suscitation, suspiration, susurration, syncopation, syndication, tarditation, terebration, termination, tesselation, thinstation, titillation, tittivation, tivoization, toolstation, translation, trepanation, trepidation, tribulation, trilobation, trituration, trucidation, trutination, turbination, uberisation, unification, unitisation, unitization, upgradation, utilisation, utilization, vaccination, vacillation, vacuolation, variegation, variolation, vectitation, vellication, venditation, ventilation, verberation, verfication, vermination, vexillation, viatication, vindication, vulneration, workstation, x-radiation

12 letters:
abalienation, abbreviation, abevacuation, abirritation, abjudication, ablaqueation, acceleration, accentuation, accomodation, accumulation, adjudication, adnomination, adosculation, adulteration, aerification, affabulation, aggeneration, agnomination, agricolation, albification, alembication, alimentation, alkalization, alliteration, amalgamation, amelioration, amortisation, amortization, annhiliation, annihilation, annomination, annumeration, annunciation, anticipation, antihalation, antizipation, apostemation, appreciation, arbitaration, arborisation, arborization, arpeggiation, articulation, aryanization, asian nation, asphyxiation, assasination, assecuration, asseveration, assibilation, assimilation, assimulation, astipulation, atmolyzation, attrectation, augmentation, auscultation, autonomation, autorisation, autorotation, autoxidation, basification, bilification, bioturbation, blastulation, blatteration, bonification, cachinnation, calcitration, calumniation, canalisation, canalization, cancellation, canonisation, canonization, cantillation, canulisation, canulization, capacitation, capitulation, castellation, centuriation, chatteration, chlorination, citification, civilisation, civilization, claudication, claustration, co-education, co-operation, coacervation, coadaptation, codification, cogeneration, cohabitation, coindication, collineation, colliquation, colluctation, colonisation, colonization, colorisation, colorization, colostration, columniation, commendation, commensation, commentation, commigration, compellation, compensation, complexation, complication, comportation, comprecation, comprobation, compurgation, concertation, conciliation, conclamation, concremation, concussation, condamnation, condemnation, condensation, confirmation, confiscation, conformation, confortation, confrication, conglobation, congregation, consecration, conservation, consignation, consociation, consommation, consopiation, conspiration, constatation, constipation, consultation, consummation, contentation, contestation, contignation, continuation, conversation, coordination, corradiation, crastination, crenellation, creolisation, creolization, cryoablation, curarization, cutinization, deactivation, dealkylation, deambulation, debacchation, debilitation, decapitation, deceleration, decentration, decoloration, decrustation, dedecoration, defatigation, defiguration, deflagration, deforciation, defraudation, degeneration, deglaciation, deionization, delaceration, delamination, deliberation, delimitation, delitigation, demodulation, demonisation, demonization, demotivation, denaturation, denizenation, denomination, denumeration, denunciation, deoppilation, deordination, depeculation, deplantation, deploitation, depreciation, depurination, deputization, deracination, deratization, deregulation, desalination, desaturation, desideration, despeciation, despoilation, despoliation, desponsation, desquamation, dessiccation, destillation, detonization, detoxication, detruncation, devaporation, digitisation, digitization, digladiation, dijudication, dilaceration, dilapidation, dilucidation, dimerisation, dimerization, dinumeration, disanimation, disboscation, disceptation, disclamation, disclination, disgradation, disgregation, disinflation, disoperation, disoxidation, dispensation, dissentation, dissertation, dissociation, distillation, disturbation, disvaluation, divarication, divinization, dynamisation, dynamization, echolocation, edulcoration, effectuation, effemination, ejerkulation, elementation, elucubration, emancipation, emargination, emasculation, embolisation, embolization, encrustation, endenization, energization, engastration, engraftation, envenomation, equalisation, equalization, equivocation, eternization, etherization, ethoxylation, eventilation, evisceration, exacerbation, exacervation, exaggeration, exasperation, exauguration, excalceation, excogitation, excruciation, exenteration, exercitation, exfiltration, exheredation, exhilaration, existimation, expatriation, expeditation, explantation, exploitation, exprobration, exspoliation, exsufflation, extimulation, extuberation, exulceration, facilitation, faradisation, faradization, felicitation, feminisation, feminization, fenestration, fermentation, fiberization, fibrillation, finalisation, finalization, fire station, flabellation, flagellation, flocculation, fluidisation, fluidization, fluoridation, fluorination, flusteration, focalisation, focalization, francisation, francization, fraternation, frumentation, gamification, gasification, gastrulation, gelatination, genetization, geniculation, glandulation, gyrification, habilitation, halogenation, hebraization, hepatisation, hepatization, hominization, homologation, humanisation, humanization, humicubation, humification, idealisation, idealization, illaqueation, illimitation, illumination, illustration, imjaystation, immiseration, immoderation, immunisation, immunization, impinguation, implantation, impregnation, in-migration, inactivation, inadaptation, inadequation, inanitiation, inauguration, incameration, incatenation, incineration, inclinnation, incrassation, incrustation, indenization, indigitation, infesttation, infibulation, infiltration, inflammation, ingemination, ingeneration, ingratiation, inhabitation, innoculation, inoccupation, inordination, inosculation, inquartation, inquietation, insalivation, insanitation, insemination, inspissation, installation, instauration, instillation, insufflation, integumation, inteneration, intergration, intermeation, intimidation, intoleration, intoxication, invagination, invalidation, inveteration, invigilation, invigoration, invultuation, in operation, islamisation, islamization, japanimation, japanization, kanalisation, kapitulation, konversation, labanotation, lachrymation, laterization, latinisation, latinization, legalisation, legalization, legitimation, levorotation, licentiation, localisation, localization, ludification, madefication, maderization, majorization, malayisation, malformation, malversation, mammillation, manipulation, masterbation, masturbation, maximisation, maximization, melanization, memorisation, memorization, menstruation, metalization, microstation, minification, minimisation, minimization, ministration, miscegnation, miseducation, misformation, mislactation, misquotation, missummation, mobilisation, mobilization, modification, monetisation, monetization, moralisation, moralization, morcellation, morigeration, motorisation, motorization, mutarotation, nasalisation, nasalization, nazification, nebulisation, nebulization, neoformation, nidification, nobilitation, notarization, notification, novelisation, novelization, nudification, obliteration, obnubilation, obtrectation, obtruncation, opsonisation, opsonization, optimisation, optimization, orbiculation, organisation, organization, ossification, overtaxation, ozploitation, pacification, paganization, palification, palpebration, panelization, panification, paralysation, paralyzation, parcellation, pediculation, penalisation, penalization, pencilmation, pernoctation, peroxidation, perpetration, perpetuation, perspiration, perturbation, pestillation, pigmentation, pistillation, pixelization, placentation, plastination, polarisation, polarization, polonization, postillation, potentiation, prefloration, prefoliation, preformation, pregustation, presensation, presentation, preservation, proclamation, profligation, progradation, prolongation, propitiation, propugnation, propulsation, protestation, puncturation, purification, quantisation, quantitation, quantization, racemisation, racemization, radiostation, ramification, rarefication, rarification, ratification, re-education, re-formation, reactivation, readaptation, reallocation, reamputation, recidivation, recuperation, redecoration, rededication, reevaluation, refoundation, regeneration, registration, reionization, rejuvenation, rejuvination, rememoration, remuneration, renaturation, renomination, renumeration, renunciation, reoccupation, reordination, repagination, repatriation, replantation, repopulation, reregulation, restagnation, restauration, resupination, reticulation, retractation, revalidation, revegetation, reverbnation, revisitation, robotization, romanisation, romanization, royalization, rubification, ruralisation, ruralization, salification, salinisation, salinization, sanitisation, sanitization, satirization, saudiization, scatteration, sciscitation, scutellation, segmentation, silanization, sinicization, sinistration, slumpflation, solarisation, solarization, solicitation, somatisation, somatization, sonification, spacestation, sparcstation, sphacelation, splenization, stercoration, sternutation, stridulation, strigilation, strobilation, subagitation, subarrhation, suberization, subhastation, sublineation, subsannation, subsignation, subsinnation, succussation, suggillation, sulphonation, sulphuration, superstation, suppalpation, supplication, supportation, suspensation, sustentation, tessellation, tetanization, theorisation, theorization, thinkstation, thunderation, tincturation, tokenization, totalization, tractoration, tradestation, transmeation, transudation, trephination, trifurcation, triplication, tripudiation, trullization, tumultuation, typification, uglification, umbilication, unionisation, unionization, unsaturation, upregulation, urbanisation, urbanization, valorisation, valorization, vaporisation, vaporization, vasodilation, vasoligation, vaticination, vehiculation, velarization, verification, vertebration, vesiculation, vigesimation, vilification, vindemiation, vinification, virilisation, virilization, vitalisation, vitalization, vituperation, vivification, vocalisation, vocalization, xxxtentacion, zivilisation

13 letters:
acceptilation, acclimatation, accombination, accommodation, accreditation, acculturation, acetification, acidification, actualisation, actualization, adipoceration, admensuration, admortization, afforestation, agglomeration, agglutination, amelification, amplification, anatomization, anejaculation, anglicisation, anglicization, animalisation, animalization, annihiliation, annualisation, annuitization, antilibration, antiquization, apophallation, appendication, appersonation, appropriation, approximation, arabicization, argumentation, aromatisation, aromatization, assassination, attemperation, authorisation, authorization, autooxidation, averruncation, backwardation, bacterization, balkanisation, balkanization, balkan nation, barbarisation, barbarization, beatification, beneficiation, biofiltration, biotinylation, brutalisation, brutalization, calcification, cannulisation, cannulization, caprification, carbonatation, carbonisation, carbonization, carbonylation, carboxylation, carburization, carcinisation, carnification, cartelization, casualisation, casualization, catechisation, catechization, cauterisation, cauterization, centesimation, cephalization, certification, chitinization, chylification, chymification, cicatrisation, cicatrization, cladification, clarification, climatisation, cliticization, co-ordination, coach station, coagmentation, coalification, cocainization, codeclination, cognomination, coinquination, cointegration, collaboration, commemoration, commiseration, communication, communisation, communization, compagination, concameration, concatenation, concentration, confabulation, confarreation, confederation, configuration, conflagration, confrontation, conglaciation, connumeration, consideration, consolidation, conspissation, conspurcation, constellation, consternation, constupration, contamination, contemplation, contrectation, cornification, corroboration, craterization, cryoturbation, customisation, customization, damnification, dandification, de-escalation, de-iodination, deaminization, decannulation, decapsulation, decarbonation, decerebration, decompilation, decorrelation, decortication, decrepitation, deduplication, defibrination, deforestation, deglutination, degranulation, dehonestation, delacrymation, deltafication, demethylation, demonstration, demyelination, densification, dentalization, denticulation, deodorisation, deodorization, deoxidization, deoxygenation, depauperation, dephlegmation, deprotonation, derealisation, derealization, desegregation, deterioration, determination, devirgination, diazotization, dieselisation, diffarreation, dignification, discalceation, dischronation, discoloration, disestimation, disfiguration, disjudication, disobligation, disoccupation, disordination, displantation, disreputation, dissemination, disseveration, dissimilation, dissimulation, distanciation, diverberation, documentation, dogmatization, dokumentation, dollarisation, dollarization, domestication, domiciliation, dramatisation, dramatization, dulcification, dysregulation, economisation, economization, effascination, electrization, emplastration, encapsidation, encapsulation, enculturation, entortilation, epimerization, epitomization, equilibration, eroticization, euthanisation, euthanization, exauctoration, exauthoration, excerebration, excortication, expectoration, expostulation, expropriation, exsuscitation, extermination, extrapolation, extravagation, extravasation, factorisation, factorization, falsification, fasciculation, ferrugination, ferrumination, fertilisation, fertilization, fetishisation, fetishization, feudalisation, firnification, fistulization, floccillation, florification, formalisation, formulization, fortification, fossilisation, fossilization, fractionation, fragmentation, frequentation, funambulation, gaelicisation, gallicization, galvanisation, galvanization, gemmification, gene mutation, germanisation, germanization, gesticulation, ghettoisation, ghettoization, glamorisation, glamorization, globalisation, globalization, glocalization, glorification, glycerination, glycosylation, granitization, graticulation, gratification, hallucination, harmonisation, harmonization, haruspication, hellenisation, hellenization, herborization, hornification, horrification, horripilation, hyalinisation, hyalinization, hybridisation, hybridization, hydroboration, hydrogenation, hydrolyzation, hydroxylation, hypnotization, hypohydration, hypothecation, illecebration, immasculation, imperforation, impersonation, impignoration, impreparation, improperation, impropriation, improvisation, inaffectation, inapplication, incapsulation, incarceration, incardination, incommodation, incorporation, incrimination, incultivation, inculturation, indianisation, indianization, individuation, inexpectation, infrigidation, ingravidation, ingurgitation, inobservation, instantiation, instimulation, insusurration, intercalation, interlocation, interlucation, interlunation, intermication, intermination, intermutation, interpolation, interrelation, interrogation, intravasation, investigation, isomerisation, isomerization, italicisation, italicization, jargonization, jollification, justification, kaolinization, kommunikation, konzentration, kurdification, labefactation, labialisation, labialization, laevorotation, lemmatisation, lemmatization, lignification, linearisation, linearization, liquification, lithification, lubrification, lumbarization, luteinization, machicolation, macromutation, magnetisation, magnetization, magnification, magyarization, malacissation, maladaptation, maleficiation, maleformation, mammonization, manifestation, marbleisation, marbleization, martyrization, matriculation, mechanisation, mechanization, mediatisation, mediatization, medullization, mellification, mentalization, mercerization, mesmerisation, mesmerization, metallization, metastization, metrification, micengenation, micronisation, micronization, microperation, misallegation, misallocation, miscegenation, misestimation, misordination, modernisation, modernization, mollification, mortification, multilocation, mummification, mundification, mutualization, myelinisation, myelinization, myeloablation, mystification, narcotisation, narcotization, necessitation, neoglaciation, neologization, neurotization, nigrification, nitrification, noctivagation, nonalienation, nonlimitation, normalisation, normalization, nullification, objectivation, obsigillation, obtenebration, opacification, orchestration, ornamentation, ostracization, out-migration, overhydration, overinflation, overvaluation, ozonification, paid vacation, pair creation, palletization, pandiculation, participation, pascalization, patrocination, patronisation, patronization, pauperisation, pauperization, pedicellation, pelletization, peneplanation, peptonization, perambulation, peregrination, periclitation, periodization, perlustration, perscrutation, perseveration, pervaporation, pervigilation, petrification, phonetization, photoablation, picturization, pidginization, pillarisation, planification, platinization, plebification, pluralisation, pluralization, pocketstation, podsolisation, podsolization, podzolization, pollicitation, pollicization, pontification, posterisation, posterization, potentization, power station, praefloration, preaccusation, preadaptation, preambulation, precipitation, precogitation, preconization, prededication, predomination, preexcitation, prefiguration, preindication, preintimation, prejudication, premedication, premeditation, prenomination, prenunciation, preoccupation, preordination, prestigiation, prevarication, primelocation, principiation, privatisation, privatization, privitization, progeneration, programmation, proliferation, prolification, prononciation, pronunciation, prosemination, prosternation, protuberation, publification, pulverisation, pulverization, putrification, qualification, racialization, radiolocation, radio station, randomisation, randomization, rasterisation, rasterization, ratiocination, re-evaluation, reaffiliation, reaffirmation, reaggravation, reapplication, rebaptization, recalculation, recalibration, reciprocation, recirculation, recognization, recombination, recompilation, reconcilation, recrimination, rectification, reduplication, reedification, reembarkation, reexamination, reexportation, refabrication, refluctuation, refocillation, reforestation, reformulation, refrigeration, regermination, regimentation, regurgitation, reimportation, reincarnation, reinnervation, reinoculation, reintegration, reliquidation, remastication, remonstration, renegotiation, reorientation, republication, repullulation, resegregation, restimulation, resuscitation, retranslation, reunification, revaccination, revendication, reverberation, rhetorication, ritualisation, ritualization, routinization, ruggedisation, ruggedization, russification, s-corporation, sacralization, scarification, scintillation, scorification, sedimentation, seguestration, self-creation, self-delation, sensitisation, sensitization, sequestration, serialisation, serialization, sermocination, sexploitation, sexualisation, sexualization, shore station, shrinkflation, signalisation, signalization, signification, sissification, skolemisation, slavicisation, snivilisation, socialisation, socialization, solemnisation, solemnization, souplantation, sovietization, space station, specification, spezifikation, sporification, stabilisation, stabilization, stalinisation, stalinization, sterilisation, sterilization, strangulation, structuration, subincusation, subirrigation, subordination, subpopulation, subsidisation, subsidization, subtilisation, subtilization, suffumigation, sulfurization, summarisation, summarization, superfetation, supernatation, suppeditation, supplantation, syllabication, syllogization, symbolisation, symbolization, syphilization, systemisation, systemization, tantalisation, tantalization, tariffication, tarnspiration, teleoperation, teleportation, temporisation, temporization, tenderisation, tenderization, terrorisation, terrorization, testification, thematization, thurification, totipalmation, trabeculation, train station, transcolation, transcreation, transfixation, transforation, translavation, translocation, transmutation, transnatation, transpiration, transvasation, transvolation, triangulation, tribalisation, tribalization, trilateration, tuberculation, turkification, tussiculation, ukrainization, unexpectation, unreformation, up-regulation, uralitization, vaccinization, vacuolisation, vacuolization, vandalisation, vandalization, variolization, vectorisation, vectorization, verbalisation, verbalization, verbification, verbigeration, vermiculation, vernalisation, vernalization, versification, victimisation, victimization, villagization, visualisation, visualization, vitrification, volcanization, vulcanisation, vulcanization, vulgarisation, vulgarization, weaponization, winterization, ws-federation, x-corporation, x-irradiation, yuppification, zincification, zombification

14 letters:
abarticulation, abrenunciation, absolutization, absquatulation, acustimulation, administration, aerosolization, africanization, african nation, aftersensation, aggrandization, alcoholisation, alcoholization, alkalinization, allegorization, aminoacylation, ammonification, anti-inflation, asexualization, authentication, auto-oxidation, autoamputation, autoionization, automatisation, automatization, autoregulation, autotoxication, axiomatization, back-formation, bastardisation, bastardization, beautification, belarusization, beta-oxidation, beta radiation, biodegradation, bioremediation, biostimulation, bituminization, blaxploitation, blood relation, bowdlerisation, bowdlerization, brusselization, calamistration, calorification, capitalisation, capitalization, caramelisation, caramelization, carbunculation, castrametation, categorisation, categorization, centralisation, centralization, centrifugation, channelisation, channelization, chaptalization, chemoradiation, circumgyration, circumnutation, circumrotation, circumvolation, citrullination, classification, co-stimulation, codistillation, colocalization, commensuration, concelebration, concorporation, concretization, concrimination, conduplication, conglomeration, conglutination, congratulation, consarcination, contemperation, contesseration, contrarotation, crystalization, decaffeination, dechlorination, decimalisation, decimalization, decolonisation, decolonization, decolorisation, decolorization, decompensation, deconsecration, decreolization, defeminization, defenestration, defibrillation, definitization, deflocculation, degasification, dehumanisation, dehumanization, dekulakization, delegitimation, delocalisation, delocalization, demobilisation, demobilization, demonetisation, demonetization, demoralisation, demoralization, denazification, deossification, depigmentation, depolarisation, depolarization, deregistration, derivatization, desalinisation, desalinization, desegmentation, despecfication, desulphuration, dethronization, detoxification, devitalisation, devitalization, devocalization, dextrorotation, differentation, digitalisation, digitalization, diphthongation, disaffiliation, disaffirmation, disaggregation, disambiguation, disapplication, disapprobation, disassociation, discolouration, disconsolation, discretization, discrimination, disembarkation, disforestation, disinclination, disinfestation, disinformation, disintegration, disneyfication, disorientation, disoxygenation, distermination, dolomitization, downregulation, dysmyelination, eburnification, eco-innovation, emulsification, enthronisation, enthronization, envenomization, epithelization, esterification, etherification, eutrophication, evangelisation, evangelization, exarticulation, exclaustration, exhereditation, exponentiation, exsanguination, fantastication, federalisation, federalization, finlandization, fissigemmation, flanderization, flossification, fluoridisation, fluoridization, foreordination, fraternisation, fraternization, fructification, fundoplication, gelatification, gelatinisation, gelatinization, generalisation, generalization, generification, gentrification, geometrization, glamourisation, glamourization, glottalization, grammatication, grangerization, graphitization, grossification, haploidisation, hemofiltration, heretification, homogenisation, homogenization, humidification, hyperhydration, hyperinflation, hyperlactation, hyperoperation, identification, illegalization, illegitimation, immobilisation, immobilization, immunofixation, imperturbation, implementation, imposthumation, inappreciation, inarticulation, incapacitation, incivilization, incontentation, incoordination, incrementation, indefatigation, indigenisation, indigenization, indoctrination, initialisation, initialization, inorganization, interbastation, intergradation, interlineation, intermediation, intermigration, interoperation, interpellation, interpretation, interspiration, inthronization, irregeneration, islamicization, italianization, japanification, juvenilization, karstification, keratinisation, keratinization, kongfrontation, l-vocalization, lapidification, lateralisation, lateralization, legal relation, legitimisation, legitimization, lexicalisation, lexicalization, liberalisation, liberalization, literalization, lyophilisation, lyophilization, lysogenisation, lysogenization, macadamization, malobservation, manustupration, mean deviation, medicalisation, medicalization, metabolization, metamotivation, micropulsation, militarisation, militarization, mineralisation, mineralization, minimalization, misacceptation, misapplication, miscalculation, miscollocation, miscomputation, misexplanation, misexplication, misimagination, misinformation, misorientation, mistranslation, modularization, mongrelization, monopolisation, monopolization, multiplication, multiplikation, musicalization, nanofiltration, naturalisation, naturalization, neutralisation, neutralization, noctambulation, nominalization, noncooperation, nonexportation, nonimportation, nonpreparation, nonrepudiation, nostrification, nuclearization, nunsploitation, obstetrication, organification, osmoregulation, overestimation, overmedication, overmodulation, overpopulation, overregulation, oversaturation, pair formation, palatalization, palmitoylation, parasitization, pasokification, pasteurisation, pasteurization, persianization, perterebration, pervestigation, petrol station, philosophation, photooxidation, plagiarisation, plagiarization, plasticization, pneumatization, point mutation, police station, politicisation, politicization, polymerisation, polymerization, popularisation, popularization, porphyrization, postgraduation, precomputation, predelineation, predestination, preexamination, preexpectation, prefabrication, prefecundation, premonstration, preponderation, prepublication, pressurisation, pressurization, prettification, prioritisation, prioritization, pronounciation, quantification, radicalisation, radicalization, re-embarkation, re-examination, reassimilation, recalcitration, recanalization, recapitulation, recolonization, recommendation, recompensation, reconciliation, recondensation, reconfirmation, reconsecration, redenomination, redintegration, redistillation, refridgeration, reglementation, regularisation, regularization, rehabilitation, reillumination, reimplantation, reinstallation, reinvigoration, relativization, remodification, remonetization, remote station, renidification, reorganisation, reorganization, repolarization, representation, repristination, reregistration, retrogradation, revalorization, revitalisation, revitalization, revivification, rigidification, saffronisation, sanctification, sanguification, saponification, scandalisation, scandalization, schematisation, schematization, schilerization, sclerotization, scp foundation, scrutinization, secularisation, secularization, securitisation, securitization, self-education, seminification, sensualization, serbianisation, set decoration, silicatization, silicification, simplification, skin sensation, social station, solidification, solubilisation, solubilization, somnambulation, sophistication, spatialization, specialisation, specialization, spherification, spirantization, stigmatisation, stigmatization, straticulation, stratification, stultification, subalternation, subinfeudation, substantiation, subway station, sulphurization, superannuation, superelevation, supererogation, superfoetation, superfoliation, superlactation, superlucration, superovulation, superpurgation, symmetrization, syncretization, tabloidization, tabularization, talibanization, telomerization, tergiversation, testamentation, thermalisation, thermalization, toei animation, topicalization, transamidation, transamination, transanimation, transformation, transfretation, transmigration, transportation, transvaluation, traumatisation, traumatization, trifluctuation, trivialisation, trivialization, trombipulation, trypsinization, tubal ligation, tyndallization, ubiquitination, ubiquitylation, uncivilization, undervaluation, uniformization, uninstallation, uterogestation, vasodilatation, vasorelaxation, vietnamization, virtualisation, virtualization, vitilitigation, volatilisation, volatilization, weatherization, westernisation, westernization, x-inactivation

15 letters:
absecon station, acclimatisation, acclimatization, acclimitization, achromatization, acupuncturation, adsignification, adult education, alphabetisation, alphabetization, alpha radiation, americanisation, americanization, androgenization, anesthetization, anticoagulation, antivaccination, appropinquation, arithmetization, arterialization, astronavigation, autocorrelation, autofecundation, autoinoculation, autonegotiation, auto limitation, backpropagation, beat generation, binary notation, bioaccumulation, bioaugmentation, bronchodilation, bruceploitation, californication, cannibalisation, cannibalization, catheterisation, catheterization, chemicalization, chondrification, circularisation, circularization, circumcursation, circumgestation, circumvallation, civilianization, co-ossification, codetermination, colonialization, comfort station, commodification, commoditization, communalization, complementation, computerisation, computerization, consumerization, contravallation, coprecipitation, corporatization, criminalisation, criminalization, crystallisation, crystallization, daily variation, de-nazification, deacidification, deafferentation, decalcification, decarbonisation, decarbonization, decarbonylation, decarboxylation, decarburisation, decarburization, decasualization, decentalisation, decertification, decidualization, decolourization, decommunization, deconcentration, decontamination, dedollarisation, defragmentation, defuzzification, deglamorization, deglobalization, dehydrogenation, deindividuation, delignification, demagnetisation, demagnetization, democratisation, democratization, demutualisation, demutualization, demystification, denitrification, denormalization, desacralization, desensitisation, desensitization, desertification, desexualization, desilverization, despecification, destabilisation, destabilization, destalinisation, destalinization, desulfurization, detribalisation, detribalization, devitrification, dezincification, diagonalisation, diagonalization, dichotomisation, dichotomization, differentiation, disarticulation, disassimilation, discommendation, disconfirmation, discontentation, discontinuation, disintoxication, disorganisation, disorganization, diversification, down-regulation, dystrophication, easygamestation, electrification, electrolyzation, electroporation, emmetropization, encephalization, etherealization, europeanisation, europeanization, european nation, excarnification, excommunication, exemplification, experimentation, extemporisation, extemporization, exteriorisation, exteriorization, externalisation, externalization, familiarisation, familiarization, filling station, formularization, fossilification, fox corporation, fractionization, frenchification, gamma radiation, gastroplication, glucuronidation, granitification, gutturalization, hierarchisation, hierarchization, hispanicization, historicization, hospitalisation, hospitalization, hydrosilylation, hyper-inflation, hypersalivation, hypostasization, hypostatisation, hypostatization, hypoventilation, immatriculation, immortalisation, immortalization, immortification, impatronization, incarnification, incentivisation, inconsideration, indemnification, indetermination, infantilization, informatisation, instrumentation, insubordination, integumentation, intensification, interarboration, interdigitation, interlamination, intermodulation, internalisation, internalization, isoimmunization, job application, kyoto animation, latensification, lichenification, logic operation, lookout station, malassimilation, malconformation, malpresentation, marginalisation, marginalization, masculinisation, masculinization, materialisation, materialization, mathematization, mcdonaldization, megacorporation, memorialisation, memorialization, mercurification, merorganization, metainformation, micro-operation, microfiltration, microgeneration, miniaturisation, miniaturization, misconsecration, multilateration, mycoremediation, mythologisation, mythologization, nanofabrication, nanoindentation, nationalisation, nationalization, nazisploitation, neuromodulation, next-generation, nixtamalization, non-cooperation, non-repudiation, nonpresentation, objectification, objectivisation, objectivization, oligomerisation, oligomerization, overelaboration, overstimulation, overt operation, overutilisation, overutilization, parallelisation, parallelization, parametrization, parentification, personalisation, personalization, personification, phi correlation, phlogistication, phosphatization, phosphorylation, photoexcitation, photoionisation, photoionization, physicalization, polish notation, politzerization, polling station, polyadenylation, preachification, precancellation, prechlorination, predeliberation, preexistimation, prefix notation, preimplantation, prenotification, preregistration, procrastination, prognostication, proselytisation, proselytization, psychoeducation, pumping station, quadruplication, quintuplication, radio radiation, raft foundation, railway station, rancidification, rationalisation, rationalization, re-presentation, reaccreditation, reafforestation, reappropriation, reauthorization, recertification, reconcentration, reconfiguration, reconsideration, reconsolidation, recontamination, redetermination, redocumentation, reforestization, refortification, regionalisation, regionalization, reharmonisation, reharmonization, rehypothecation, reincorporation, reinvestigation, renormalisation, renormalization, reprivatization, resocialization, retrocopulation, romanticisation, romanticization, sanskritisation, self-abnegation, self-accusation, self-admiration, self-alienation, self-castration, self-centration, self-estimation, self-evaluation, self-exaltation, self-immolation, self-medication, self-motivation, self-mutilation, self-regulation, self-revelation, service station, sexual relation, sex segregation, singularization, skeletonization, social relation, solar radiation, speechification, standardisation, standardization, star divination, sublimification, subministration, suboptimization, suburbanization, subvocalization, suffix notation, supercavitation, superexaltation, superexcination, superordination, supersaturation, supersemination, supertuberation, supparasitation, supplementation, syllabification, synchronisation, synchronization, systematisation, systematization, taste sensation, tautomerization, touch sensation, tranquilization, transactivation, transfiguratien, transfiguration, transliteration, transplantation, tuberculization, ultrafiltration, underestimation, underevaluation, underpopulation, undetermination, vascularisation, vascularization, verbal creation, weather station, wind generation, with moderation

16 letters:
acme corporation, adp-ribosylation, anaesthetization, anathematisation, anathematization, anti-information, anti-vaccination, authentification, auto-correlation, auto-inoculation, autoimmunization, autointoxication, autopurification, axis of rotation, back-propagation, bicapitalisation, binary operation, bioconcentration, biodeterioration, biomagnification, biosequestration, canonicalization, characterisation, characterization, christianisation, christianization, circumambulation, circumdenudation, circumnavigation, co-determination, co-precipitation, cocacolonization, collectivisation, collectivization, compactification, compartmentation, complexification, congeliturbation, consignification, containerisation, containerization, contraindication, copolymerization, counterpulsation, countervallation, covert operation, cross-validation, cryopreservation, cuticularization, de-stalinisation, de-stalinization, dealcoholization, debituminization, decentralisation, decentralization, decimal notation, declassification, decossackization, dedolomitization, dehumidification, delegitimisation, delegitimization, demilitarisation, demilitarization, demineralisation, demineralization, demonopolization, denaturalization, denuclearisation, denuclearization, depoliticisation, depoliticization, depolymerization, depressurisation, depressurization, deproteinization, desulphurisation, desynonymization, diphthongisation, diphthongization, direct quotation, disaccommodation, disappropriation, disequilibration, disincorporation, disqualification, dressing station, earth's rotation, editorialization, electromigration, fictionalisation, fictionalization, fifth-generation, financialization, first-generation, flabbergastation, forisfamiliation, free-association, free association, gasoline station, geosequestration, grade separation, heat prostration, hemagglutination, higher education, hybe corporation, hydroformylation, hypercomputation, hyperconjugation, hyperstimulation, hyperventilation, hypoalimentation, hypopigmentation, immunomodulation, immunoregulation, indiscrimination, intercorporation, interpenetration, in collaboration, in that location, irreconciliation, isoagglutination, legal separation, loan application, loan translation, logical relation, manhattanization, marsupialization, medical relation, meta-information, micro-irrigation, microcirculation, microfabrication, micropropagation, misappropriation, miscommunication, mispronunciation, mithridatization, moral obligation, multicombination, municipalisation, municipalization, musical notation, neurostimulation, non-solicitation, nonparticipation, nonproliferation, norwegianization, oil conservation, oral examination, osseointegration, overcompensation, overexploitation, parameterization, partner relation, phase modulation, photocoagulation, photodegradation, photorespiration, phytoremediation, politicalization, polycondensation, post-reformation, pre-congregation, pre-installation, predetermination, prequalification, presignification, prestidigitation, previsualization, problematization, pseudocopulation, pseudonymization, pulse modulation, radappertization, railroad station, re-afforestation, recapitalization, reclassification, reintermediation, reinterpretation, remilitarisation, remilitarization, remineralization, retrovaccination, saccharification, sampling station, sectionalisation, sectionalization, segmentalization, self-affirmation, self-cultivation, self-degradation, self-deprecation, self-examination, self-gratulation, self-indignation, self-oscillation, self-pollination, self-realisation, self-realization, self-reformation, self-replication, self-stimulation, serial operation, serpentinization, skew correlation, spatial relation, spiritualisation, spiritualization, standing ovation, studentification, subconstellation, supercompilation, superfecundation, supermarionation, superpermutation, t-glottalization, thermoregulation, third-generation, tintinnabulation, tranquillization, transcapsidation, transculturation, transmethylation, transpeptidation, underutilization, universalisation, universalization, unsanctification, unsophistication, unsubstantiation, vibroejaculation, visual sensation, with inspiration, with ostentation, with speculation, zoho corporation

17 letters:
academic relation, across the nation, artistic creation, auto-intoxication, autosensitization, biomineralization, biotransformation, bitwise operation, blood coagulation, bronchodilatation, bureaucratisation, bureaucratization, business relation, chemical notation, chemoembolization, chromopertubation, circumstantiation, close corporation, collateralization, commercialisation, commercialization, conceptualisation, conceptualization, consubstantiation, contextualisation, contextualization, control operation, copenhagenization, counterirritation, cross-correlation, cross-examination, cross-pollination, de-baathification, de-identification, decommodification, decriminalisation, decriminalization, dedifferentiation, defamiliarization, deflectionization, dematerialisation, dematerialization, demythologisation, demythologization, denationalisation, denationalization, depersonalisation, depersonalization, dephlogistication, dephosphorization, dephosphorylation, desynchronization, disintermediation, diurnal variation, endoreduplication, epithelialization, eternal damnation, final examination, fractionalization, girls' generation, giving medication, haemagglutination, heat of formation, hemoconcentration, homosocialization, hyperalimentation, hyperimmunization, hyperpigmentation, hyperpolarization, hypocalcification, hyposensitisation, hyposensitization, impersonalization, impersonification, individualisation, individualization, industrialisation, industrialization, intercolumniation, interfenestration, iodolactonization, iq classification, late registration, line organization, logical operation, machine operation, maladministration, metacommunication, micro-circulation, micromanipulation, micropigmentation, misclassification, misidentification, misinterpretation, misrepresentation, natural elevation, netflix animation, neurodegeneration, neuroinflammation, neuroregeneration, neutron radiation, nitrogen fixation, non-proliferation, nondiscrimination, occidentalization, oral presentation, orthogonalization, overdetermination, overqualification, painful sensation, particularisation, particularization, pedestrianisation, pedestrianization, peri-urbanisation, peripheralisation, peripheralization, permineralization, personal relation, pharyngealization, photodissociation, photoreactivation, pornographication, pre-qualification, preadministration, pro-globalization, provincialization, pseudoexfoliation, pseudoreplication, radio observation, rate of inflation, recorporification, recrystallisation, recrystallization, redifferentiation, renationalization, revascularization, second-generation, self-annihilation, self-condemnation, self-condensation, self-consecration, self-depreciation, self-flagellation, self-organisation, self-organization, self-perpetuation, self-preservation, self-renunciation, semantic relation, semivitrification, shell corporation, silent generation, soil conservation, spaghettification, special education, structuralization, subcategorization, subspecialization, superalimentation, supercolumniation, supercompensation, superinpregnation, tactile sensation, telecommunication, temporal relation, theatricalization, thermocoagulation, transelementation, transillumination, transistorization, trust corporation, undifferentiation, vacuum aspiration, value orientation, valve corporation, veiled accusation, vernacularization, visible radiation, within temptation

18 letters:
acid precipitation, active application, anti-globalization, antidiscrimination, auditory sensation, bioinstrumentation, board of education, bourgeoisification, by experimentation, change of location, change orientation, closed corporation, computer operation, counter-adaptation, counterreformation, credit application, cross-presentation, cryptic coloration, data communication, de-ba'athification, dechristianization, direct correlation, disproportionation, dissyllabification, double-elimination, dunkirk evacuation, dust contamination, electrocoagulation, electrodesiccation, electroejaculation, electron radiation, evapotranspiration, female ejaculation, fiduciary relation, field of operation, grammaticalization, haemoconcentration, hyperfractionation, hypernormalisation, hypersensitization, immunopotentiation, indian reservation, infantile fixation, infrared radiation, inside information, intercommunication, law of gravitation, law of segregation, loan participation, magnetic variation, magnitude relation, majority operation, mental reservation, mental retardation, meta-communication, microencapsulation, military formation, missionary station, monophthongization, naleadministration, naval installation, neovascularization, nier reincarnation, nikola corporation, non-discrimination, object-orientation, operationalization, optical aberration, oral communication, overcapitalisation, overcapitalization, overgeneralization, overpressurization, overrepresentation, oversimplification, overspecialization, oxo-biodegradation, parallel operation, paravirtualization, patent application, photoisomerization, photosensitization, physical education, political relation, polyesterification, pressure sensation, prestidigitization, printing operation, private foundation, proletarianization, pseudolocalization, racial segregation, radiocommunication, recharacterization, roblox corporation, self-actualisation, self-actualization, self-certification, self-contemplation, self-determination, self-domestication, self-fertilisation, self-fertilization, self-glorification, self-gratification, self-incrimination, self-justification, self-mortification, self-recrimination, sentimentalisation, sentimentalization, serial publication, standard deviation, station-to-station, surgical operation, telencephalization, television station, territorialisation, territorialization, transmogrification, transubstantiation, underdetermination, warning coloration, water conservation, water of hydration, without moderation, with consideration, with determination, world organization

19 letters:
aegean civilization, afterdepolarization, allotransplantation, alter-globalization, anti-discrimination, autophosphorylation, autotransplantation, auxiliary operation, bush administration, cartilaginification, cherenkov radiation, chevron corporation, cognitive operation, complement fixation, conventionalisation, conventionalization, counter-reformation, counterurbanization, counter reformation, cross-contamination, cross-fertilisation, cross-fertilization, cytodifferentiation, dehydrochlorination, dehydrohalogenation, deindustrialisation, deindustrialization, departmentalisation, departmentalization, de jure segregation, doctor of education, electrochlorination, feast of dedication, group participation, hyperkeratinization, immunoprecipitation, inertial navigation, insider information, intellectualisation, intellectualization, interior decoration, interstratification, judicial separation, linguistic relation, logical implication, machine translation, magnetic levitation, master of education, medical examination, micro-encapsulation, midterm examination, minoan civilization, mischaracterization, most-favored-nation, multiplex operation, nervous prostration, neurorehabilitation, observation station, olfactory sensation, operation bagration, partial correlation, phacoemulsification, photodisintegration, photopolymerization, private corporation, professionalisation, professionalization, pseudohallucination, public presentation, reepithelialization, reindustrialization, scandinavian nation, secondary education, self-congratulation, self-identification, social organization, suspended animation, swiss confederation, threshold operation, transesterification, transsubstantiation, ultracentrifugation, undercapitalization, underrepresentation, under consideration, unspoken accusation, victory celebration, xenotransplantation

20 letters:
amphibious operation, amplitude modulation, angle of inclination, animal communication, anthropomorphization, arithmetic operation, background radiation, baptist denomination, black-body radiation, broad interpretation, celestial navigation, compartmentalisation, compartmentalization, concurrent operation, conditional relation, counterdemonstration, counterproliferation, cross-classification, cross-multiplication, cross-stratification, deterritorialization, de facto segregation, dreamworks animation, electro-puncturation, electrocauterization, electrogalvanization, elementary education, enabling legislation, financial obligation, frequency modulation, geological formation, grammatical relation, guilt by association, heat of condensation, heat of dissociation, heat of vaporization, hepburn romanization, hydrodesulfurization, indirect correlation, institutionalisation, institutionalization, internationalisation, internationalization, large-capitalisation, large-capitalization, legal representation, lukasiewicz notation, magnetic inclination, microminiaturisation, microminiaturization, montessori education, mortgage application, musical organization, negative correlation, negative stimulation, parks and recreation, pecuniary obligation, photophosphorylation, physical restoration, police investigation, positive correlation, racial extermination, rate of acceleration, rate of depreciation, self-differentiation, sequential operation, small-capitalisation, small-capitalization, spherical aberration, spurious correlation, surface assimilation, systemic circulation, transdifferentiation, triboelectrification, vertical combination, vertical integration, visual communication, vocational education

21 letters:
antitrust legislation, behavior modification, broadcast syndication, business organization, cardiac resuscitation, carter administration, clandestine operation, consecutive operation, criminal conversation, digital communication, economic mobilization, lecture demonstration, mathematical notation, mathematical relation, mental representation, military installation, neuroimmunomodulation, nondimensionalization, nonlinear correlation, north american nation, point of accumulation, political orientation, practical application, professional relation, protective coloration, psychic communication, pulmonary circulation, reagan administration, religious orientation, selective information, south american nation, sympathetic vibration, the final destination, the hertz corporation, ultraviolet radiation, without consideration, written communication

22 letters:
artificial respiration, asynchronous operation, auditory communication, clinton administration, cradle of civilization, cultural appropriation, deinstitutionalisation, deinstitutionalization, demand for explanation, economic strangulation, financial organization, holy day of obligation, horizontal combination, horizontal integration, intelligence operation, literal interpretation, lumbar disc herniation, make-a-wish foundation, mathematical operation, murder of xxxtentacion, mycenaean civilization, part to whole relation, postmortem examination, pulse-width modulation, secretary of education, simultaneous operation, software documentation, source of illumination, spontaneous generation, telephone conversation, warner bros. animation, whole to part relation, workmen's compensation

23 letters:
anabaptist denomination, anomalous communication, artificial insemination, central american nation, character assassination, concrete representation, covid-19 misinformation, cross-collateralization, dark field illumination, department of education, feast of the dedication, fractional distillation, internal representation, myocardial inflammation, philosophy of education, physical rehabilitation, preliminary examination, protestant denomination, proto-industrialization, psychical communication, reverse polish notation, single-page application, sony pictures animation, symbolic representation

24 letters:
amphibious demonstration, closely held corporation, confidential information, dark ground illumination, destructive distillation, eggborough power station, electronic communication, kendall rank correlation, linguistic communication, near-field communication, original video animation, philanthropic foundation, pictorial representation, professional association, radioimmunoprecipitation, ralph lauren corporation, random number generation, reasoning by elimination, simulacra and simulation, the football association, ultraviolet illumination, ventricular fibrillation, world trade organization

25 letters:
articles of incorporation, demand for identification, electromagnetic radiation, female genital mutilation, indus valley civilisation, kernel density estimation, letters of administration, paramilitary organization, six degrees of separation, unemployment compensation, vocational rehabilitation, world health organization

26 letters:
badminton world federation, boeing 737 next generation, coefficient of correlation, fourfold point correlation, hydrogen ion concentration, indian olympic association, international organization, life insurance corporation, privately held corporation, python software foundation, right of first publication, robotic process automation, root-mean-square deviation, therapeutic rehabilitation

27 letters:
basic access authentication, binary arithmetic operation, brown v. board of education, correctional rehabilitation, disney television animation, freedom from discrimination, multi-factor authentication, national lampoon's vacation, newton's law of gravitation, progressive web application, proportional representation, secretary of transportation

28 letters:
american medical association, asian football confederation, certificate of incorporation, department of transportation, dewey decimal classification, el nino southern oscillation, savings and loan association, simulated military operation

29 letters:
cardiopulmonary resuscitation, floccinaucinihilipilification, non-governmental organization, through empirical observation

30 letters:
call-with-current-continuation, federal housing administration, social security administration

31 letters:
federal bureau of investigation, health maintenance organization

32 letters:
international labor organization, kendall partial rank correlation

33 letters:
food and agriculture organization, international finance corporation, international labour organization, world meteorological organization

34 letters:
north atlantic treaty organization

35 letters:
international maritime organization

37 letters:
federal deposit insurance corporation, federal national mortgage association, international development association

38 letters:
federal home loan mortgage corporation

40 letters:
international civil aviation organization, national aeronautics and space administration, united nations educational scientific and cultural organization

5 letters:
basin, hazan, kazan, raven, haven, jason, maven, asian, mason

6 letters:
graven, brazen, hasten, blazon, craven, nathan, shaven

7 letters:
evasion, suasion, caisson, chasten

8 letters:
unshaven, abrasion, invasion, occasion, equation, emblazon, afrasian, nganasan

9 letters:
malaysian, new haven, corrasion, capsaicin, freemason, caucasian, pervasion, sea raven

10 letters:
persuasion, dissuasion, slop basin, stonemason

11 letters:
tidal basin, river basin, night raven, tax evasion, on occasion, well-shaven

12 letters:
clean-shaven

13 letters:
wave equation, smooth-shaven

14 letters:
drainage basin

15 letters:
linear equation, social occasion

17 letters:
personal equation

19 letters:
regression equation, ceremonial occasion

20 letters:
exponential equation

21 letters:
differential equation

29 letters:
partial differential equation