2 syllables:
chisholm, chism, chisum, disum, ism, pisum, prism, prisme, prizm, qutbism, schism, scism, trism, visum

3 syllables:
-tropism, ablism, agism, autism, autisme, baalism, baathism, ballism, bathmism, biprism, birchism, bletonism, bonism, bordism, borism, bossism, bromism, brownism, brutism, bushism, carlism, carnism, chromism, cladism, comtism, cretism, czarism, danism, dengism, facism, fascism, fatism, fattism, fauvism, flipism, gaycism, georgism, geusdism, gloablism, graecism, grecism, guelfism, heightism, humism, hylism, ipsism, jahvism, klanism, kneippism, leftism, leucism, luddism, lulism, mahdism, malism, manism, mecism, merism, momism, nanism, neurism, nihlism, nomism, ophism, ovism, owlism, papism, peanism, phallism, philism, phonism, photism, phrenism, porism, quindism, quinism, racemism, racism, racisme, ramism, rightism, saktism, sanism, scotism, sectism, shaivism, shaktism, shaykhism, sikhism, simplism, slumism, sofism, sophism, spermism, sphacelism, squadrism, stahlism, statism, stundism, sufiism, sufism, tourism, traulism, troilism, tropism, trumpism, tsarism, tuism, turcism, tychism, tzarism, verism, weightism, wholism, yahvism, ynglism, yogiism, zoilism, zunism

4 syllables:
acmeism, acosmism, acrotism, actinism, activism, adevism, adultism, agapism, agathism, agonism, agorism, albinism, alevism, algorism, allelism, alogism, alpinism, altruism, altruisme, aneurism, anglicism, anilism, animism, annulism, anthorism, antiprism, apathism, aphetism, aphorism, aphorisme, aptyalism, argyrism, artivism, asterism, atenism, atheism, atomism, atropism, atticism, authorism, autoecism, axillism, babelism, balanism, barbarism, barbarisme, bastardism, bedlamism, beggarism, behmenism, belletrism, bellicism, benthamism, benzhuism, berberism, bergsonism, betacism, biblicism, bimastism, blepharism, blockheadism, boehmenism, bolshevism, boosterism, boswellism, botchalism, botulism, botulisme, bourbonism, bovarism, braggardism, braggartism, brahmanism, brahminism, brahmoism, brandalism, brigandism, briticism, britishism, brominism, brutalism, buchmanism, buffoonism, bullionism, bulverism, burkhanism, cabalism, cabbalism, caesarism, caffeinism, calvinism, cameralism, canaanism, candaulism, caodaism, carnalism, castroism, casualism, catechism, catharism, cauterism, celticism, centonism, centralism, cephalism, cesarism, chaldaism, chartalism, chasidism, chassidism, chattelism, chauvinism, chauvinisme, cheondoism, chimerism, chloralism, christianism, chromatism, churnalism, cinchonism, citicism, civicism, classicism, cledonism, clintonism, cobordism, cockneyism, colorism, commatism, commonism, communism, communisme, comunism, concettism, conclavism, cosmicism, coturnism, creticism, cretinism, criticism, croneyism, cronyism, crotalism, cymbalism, cynicism, cyphonism, dadaism, daltonism, dandyism, darwinism, deaf-mutism, dentalism, denturism, despotism, despotisme, devilism, dichromism, dicrotism, diglottism, dimerism, dinkoism, diorism, dippoldism, do-goodism, docetism, dodoism, dogmatism, donatism, doricism, dramatism, druidism, dualism, dynamism, dynamisme, dysbarism, dysphemism, ebionism, ebullism, egoism, egomism, egotism, eidolism, elitism, embolism, energism, englishism, entryism, eonism, ergotism, erotism, erythrism, escapism, essenism, etacism, etatism, ethicism, ethnicism, eumerism, eunuchism, euphemism, euphonism, euphuism, exorcism, expertism, extremism, facadism, fairyism, familism, faradism, fatalism, federalism, feeneyism, feminism, fetichism, feticism, fetishism, feudalism, fidelism, finalism, finitism, fletcherism, fluidism, flunkyism, flunlyism, fogyism, foreignism, formalism, formulism, fossilism, fraternism, free-soilism, freeganism, frivolism, fusionism, futurism, gaianism, gaitskellism, galenism, gallicism, galvanism, gammacism, gangsterism, gargarism, gargoylism, garveyism, gasconism, generalism, genteelism, gentilism, germanism, gestaltism, gipsyism, girondism, globalism, gnosticism, gosperism, gothicism, gourmandism, grangerism, grundyism, guruism, gypsyism, hacktivism, hagarism, hansonism, hassidism, hazimism, heathenism, hebraism, heckerism, hectorism, hedonism, hegelism, hellenism, helotism, herbalism, hermitism, heroism, herpetism, hetanism, high-churchism, highbrowism, hinduism, hipsterism, hirsutism, hispanism, hitlerism, hoboism, hoodlumism, hoydenism, hucksterism, humanism, humorism, hunkerism, hurufism, husakism, hussitism, hybridism, hylicism, hyloism, hypnotism, ibsenism, iconism, idolism, ietsism, ilminism, imagism, incivism, inkhornism, innatism, intimism, iodism, iricism, irishism, ismailism, itacism, izedism, jansenism, japanism, jediism, jensenism, jihadism, journalism, journalisme, judaism, jujuism, junkerism, kabbalism, kahanism, kaiserism, karaism, kemalism, kemetism, kevinism, kirchnerism, laborism, labourism, laconism, laicism, lamaism, lambdacism, landlordism, lathyrism, latinism, legalism, leninism, levelism, liberalism, lionism, listerism, localism, locoism, logicism, lollardism, londonism, lonerism, low-churchism, loyalism, luminism, lutherism, lyricism, macarism, machoism, macroprism, madkhalism, magmatism, magnetism, magonism, mammonism, mancinism, manganism, mangonism, manierism, mannerism, marcionism, marconism, marhaenism, marinism, martialism, martinism, masculism, maudlinism, mayidism, mazdaism, mazdakism, mechanism, meconism, meliorism, mendelism, meninism, menshevism, mentalism, mephitism, mercurism, merycism, mescalism, mesmerism, metacism, methodism, metopism, microprism, milksopism, millerism, mimetism, mithraicism, mithraism, mobutism, modernism, molinism, monachism, monadism, monergism, mongrelism, montanism, moralism, moronism, morphinism, mugwumpism, mullahism, muralism, muslimism, mutacism, myalism, mycetism, mycterism, mysticism, mytacism, naderism, narcisism, narcissism, nasserism, natalism, nativism, naturalism, naturism, navalism, negroism, neoism, neolism, neonism, nephalism, nepotism, neptunism, nervosism, neutralism, nicol prism, nihilism, nihillism, nimbyism, nomadism, nordicism, normanism, novelism, obelism, obiism, occamism, odinism, odylism, oedipism, ogrism, old-maidism, onanism, ophidism, optimism, optomism, oralism, organism, orphanism, ostracism, owenism, pacifism, padronism, paganism, palamism, pancosmism, pandarism, pandeism, panderism, panpsychism, pansophism, panzoism, partialism, passivism, pathetism, paulinism, pauperism, pc-ism, pelmanism, pentaprism, peonism, perkinism, peronism, pessimism, pessimisme, petalism, petrinism, phallicism, phosphorism, phyletism, physicism, piebaldism, pilotism, piquerism, plagarism, plagerism, plagiarism, plagirism, platformism, platonism, plotinism, pluralism, pneumatism, pointilism, pointillism, populism, post-fascism, post-zionism, powellism, pragmatism, prelatism, presbytism, preterism, prettyism, principlism, privatism, prochronism, prophetism, prussianism, psithurism, psittacism, ptyalism, puerilism, puppyism, puseyism, putanism, putinism, pyrrhonism, pyrrhotism, pythonism, quackerism, quakerism, quietism, quininism, quranism, rachmanism, racialism, ranterism, rayonism, reaganism, rebaptism, red-tapism, regalism, retifism, revanchism, rheumatism, rhotacism, ribbonism, rigorism, robotism, rochon prism, romanism, rombergism, rotacism, rousseauism, routinism, rowdyism, royalism, ruralism, rusticism, sadducism, saivism, sarmatism, satanism, saturnism, satyrism, saxonism, scepticism, schematism, scholarism, scientism, sciolism, scotticism, scoundrelism, sedentism, semitism, servilism, shakerism, shemitism, shepherdism, shoddyism, short-termism, sialism, siderism, sigmatism, sinapism, sinicism, sintoism, skepticism, skinnerism, slacktivism, socialism, socialisme, socratism, solarism, solecism, solidism, somatism, somnolism, souperism, southernism, spartanism, specialism, spermatism, spintherism, spiritism, spoonerism, spread-eagleism, stahlianism, stalinism, standpattism, stigmatism, stimulism, stoicism, strasserism, strychninism, subitism, subtilism, suicism, syllogism, symbolism, sympathism, symphytism, synchromism, synchronism, syncretism, synechism, synergism, syntrophism, tabagisme, tantalism, taylorism, tellurism, tenebrism, teratism, terminism, terroism, terrorism, terrorisme, tetanism, thanatism, thatcherism, third-worldism, thomaism, thyroidism, tigerism, titanism, titoism, toadyism, tokenism, tonalism, toryism, totalism, totemism, transvestism, traumatism, trialism, tribadism, tricrotism, triticism, trotskyism, turanism, tutorism, tyronism, ultraism, undinism, uniatism, unionism, uranism, urethrism, utopism, vaginism, vaishnavism, vaisnavism, vanguardism, vedaism, veganism, vegetism, verbalism, virilism, vishnuism, vitalism, volcanism, voltinism, voodooism, vorticism, vowelism, vulcanism, vulgarism, vulpinism, vulturism, wahabism, wahhabism, warlordism, wegotism, wellerism, westernism, witticism, womanism, yahooism, yankeeism, yarsanism, yazidism, yiddishism, zabernism, zanyism, zealotism, zionism, zoophilism, zoroastrism, zurvanism

5 syllables:
absolutism, absolutisme, abstentionism, abstractionism, acephalism, achromatism, actualism, adactylism, adamitism, adoptianism, adoptionism, adrenalism, adventurism, aerotropism, aestheticism, africanism, agnosticism, agrammatism, agritourism, agrotourism, air embolism, alcoholism, alienism, alloerotism, allomerism, allosterism, allotropism, alphabetism, amelanism, amensalism, amoralism, amphoterism, anabaptism, anabaptisme, anachorism, anachronism, anachronisme, anacrotism, analogism, anatocism, anatopism, anchoretism, andabatism, androgynism, anglicanism, aniconism, anilinism, animalism, animatism, anomalism, anorchidism, antagonism, antagonisme, anti-racism, anti-shi'ism, anti-statism, anti-zionism, antichronism, anticivism, antiracism, aplanatism, apophatism, arachnidism, aramaism, archaicism, arianism, arsenicism, aryanism, asceticism, asepticism, aspermatism, aspheterism, assianism, astaticism, astigmatism, asynchronism, asynclitism, asystolism, athyroidism, atlanticism, atomicism, atonalism, atropinism, audianism, augustinism, australianism, austrofascism, autochthonism, automatism, automatisme, autonomism, autotelism, autotropism, averroism, bachelorism, barbiturism, behaviorism, behaviourism, berkeleianism, bifocalism, bilingualism, biologism, bipedalism, biracialism, bogomilism, bokononism, bonapartism, bowdlerism, buchananism, bureaucratism, cahenslyism, cannibalism, capitalism, carnivorism, cartesianism, catabolism, catabolisme, catacrotism, cataphatism, catasterism, catastrophism, catheterism, catholicism, causationism, cavalierism, cenobitism, cerebralism, cessationism, characterism, charientism, charlatanism, chemotropism, chloroformism, chromaticism, chronotropism, classicalism, clericalism, clientelism, cognitivism, collectivism, commensalism, commercialism, communalism, conceptualism, conciliarism, confucianism, connectionism, connectivism, conservatism, constructionism, constructivism, consumerism, contortionism, contrabandism, copperheadism, corporatism, creationism, credentialism, criminalism, crypto-fascism, cryptorchidism, curialism, cytotropism, decimalism, democratism, demoniacism, demonianism, denialism, descriptivism, determinism, diabolism, diachronism, diactinism, dialogism, diastrophism, diatropism, dichromatism, didacticism, die-hardism, diffusionism, digitalism, dilettantism, dioecism, diphysitism, diplomatism, dissenterism, divisionism, dogberryism, dogmaticism, dominionism, dowagerism, dramaticism, dynamitism, dynasticism, eclecticism, eco-tourism, ecofascism, ecologism, ecotourism, ectorganism, edentulism, electicism, emergentism, emotivism, empiricism, enactivism, endaemonism, entorganism, epicenism, epicurism, epigonism, epilogism, epimerism, epiphytism, epipolism, epizoism, erastianism, erecting prism, eremitism, ergotropism, eroticism, erraticism, essentialism, estheticism, eternalism, eudaemonism, eudaimonism, eudemonism, euhemerism, eunuchoidism, eurasianism, euthyroidism, evangelism, exclusionism, exclusivism, exoticism, expansionism, expressionism, expressivism, externalism, extractivism, extropianism, fabianism, factionalism, factualism, familialism, fanaticism, fantasticism, favoritism, favouritism, febronianism, fenianism, feuilletonism, fissiparism, foot fetishism, fortuitism, fractionalism, fraternalism, freemartinism, freneticism, freudianism, funambulism, functionalism, gallicanism, gear mechanism, genevanism, geomalism, geotourism, geotropism, ghibellinism, gonochorism, gradualism, grammaticism, gravitropism, guild socialism, gutturalism, haptotropism, helleborism, hemiballism, hermaphrodism, hermeticism, heroinism, hetaerism, hibernicism, hinayanism, hippocratism, hispanicism, historicism, homothallism, hooliganism, hospitalism, hottentotism, humoralism, hydrargyrism, hydrotropism, hyperbolism, hypericism, hypobarism, hypocorism, idiotism, ignorantism, ignosticism, illegalism, illiberalism, illuminism, illusionism, immanentism, immersionism, immobilism, immoralism, immortalism, impressionism, inclusivism, indianism, indigenism, inductivism, infantilism, inflationism, infusionism, initialism, inochentism, inquilinism, insularism, integralism, internalism, invalidism, iotacism, irenicism, ishmaelitism, isma'ilism, isobarism, isochronism, isogonism, isomerism, isosterism, isotropism, italianism, italicism, jacobinism, jesuitism, josephinism, juvenilism, kantianism, katabolism, keynesianism, kineticism, labialism, lacanianism, laconicism, larrikinism, latrodectism, legitimism, leprechaunism, libertinism, lingayatism, loxodremism, loxoscelism, lutheranism, luxemburgism, lysenkoism, macaulayism, machiavelism, machiavellism, magianism, mahayanism, mahometism, malapropism, malebranchism, male chauvinism, mandaeanism, mandarinism, mandeanism, manicheanism, manualism, marginalism, marianism, martinetism, marxianism, masculinism, maternalism, matriotism, maximalism, medievalism, megadontism, mendelianism, mennonitism, mercantilism, mesomerism, messianism, metabolism, metachronism, metamerism, meteorism, micawberism, militarism, millenarism, minimalism, misanthropism, moderatism, mohammedism, moldovenism, monasticism, monetarism, monocrotism, monoecism, monogenism, monolatrism, monopolism, monopsychism, monorchidism, monothelism, monotropism, mosaicism, mountebankism, muadlinism, munchausenism, mundialism, mussulmanism, mutualism, nahualism, narcoticism, nazaritism, necrophilism, negativism, neo-fauvism, neo-luddism, neo-thomism, neofascism, neologism, neophytism, neoterism, neuroticism, neurotropism, new criticism, nicotinism, nietzscheanism, noahidism, noctambulism, nominalism, nondualism, nonjurorism, nonunionism, noumenalism, novatianism, nyctitropism, objectivism, obscurantism, obstructionism, officialism, oneirism, ontologism, opiumism, opportunism, optical prism, ordinalism, organicism, origenism, orleanism, orthotropism, ottomanism, overtourism, pacificism, paedobaptism, pan-asianism, pan-celticism, pan-germanism, pan-iranism, pan-islamism, pan-latinism, pan-mongolism, panchromatism, paneulogism, panhellenism, panhispanism, panislamism, panopticism, panspermatism, parabolism, parachronism, paralellism, parallelism, paralogism, parentalism, parkinsonism, parnassianism, partisanism, pastoralism, paternalism, patricianism, patriotism, paulicianism, pedanticism, pedobaptism, pentamerism, perdurantism, perfectionism, peritonism, personalism, perspectivism, phalansterism, pharisaism, philanthropism, philhellenism, philistinism, phoenicianism, phoneticism, photochromism, phototropism, physicalism, plant symbolism, platycnemism, plebeianism, pleiotropism, pleochroism, poeticism, polychroism, polycrotism, polygenism, polyglotism, polyglottism, polymastism, polymerism, polyphonism, polythelism, popularism, positivism, post-anarchism, post-feminism, post-modernism, postfeminism, postgenderism, posthumanism, postmodernism, practicalism, pragmaticism, precisianism, precisionism, prescriptivism, primitivism, pronatalism, propagandism, prosaicism, proselytism, prosylogism, protagonism, protectionism, protestantism, proto-fascism, protologism, provincialism, proxenetism, prudentialism, pseudochronism, psilanthropism, psychologism, psychoticism, puritanism, pygmalionism, pythagorism, radicalism, raphaelism, rationalism, reactionism, recidivism, recitivism, reductionism, reductivism, refugeeism, regionalism, relationism, relativism, religionism, religiousism, remodernism, restrictionism, reunionism, revisionism, rheotropism, rhythm-al-ism, ritualism, romanticism, ruffianism, sabianism, saint-simonism, salicylism, saltationism, salvationism, sanamahism, sans-culottism, sansculottism, saprophytism, sardonicism, scandinavism, scholasticism, sebastianism, secessionism, sectionalism, secularism, self-criticism, sensationism, sensualism, separatism, seraphicism, serialism, sethianism, sexdigitism, sexualism, shunamitism, sinecurism, slavophilism, socraticism, somnambulism, sovietism, state socialism, stercoranism, stibialism, subjectivism, substantialism, substantivism, suffragettism, suicidism, supremacism, suprematism, surrealism, sybaritism, symmetalism, symmetallism, syndactylism, syndicalism, synoecism, synorchidism, syriacism, syrianism, systematism, tammanyism, taurodontism, tautologism, tautomerism, teetotalism, tetramerism, teutonicism, textualism, theanthropism, theogonism, theosophism, thermochromism, thermotropism, thigmotropism, trade-unionism, traditionlism, traducianism, transfeminism, transgenderism, transhumanism, transvestitism, trichromatism, trilingualism, triumphalism, trivialism, troglodytism, trophotropism, turntablism, tutiorism, ultra-leftism, uniformism, vagabondism, vancouverism, vaticanism, venizelism, voluntarism, volunteerism, voluntourism, wesleyanism, whataboutism, wilhelminism, with cynicism, xanthochroism, xerophytism, yugoslavism, zalmoxianism, zarathustrism, zwinglianism

6 syllables:
able-bodiedism, abolitionism, academicism, accidentalism, adiaphorism, aeroembolism, afro-pessimism, afrofuturism, agrarianism, agriculturism, agriterrorism, agroterrorism, aldosteronism, allodialism, alloeroticism, alteregoism, alternativism, americanism, anagrammatism, analphabetism, anathematism, anationalism, anatricrotism, anecdotalism, anemotropism, anglo-saxonism, animalculism, anisotropism, annexationism, anomoeanism, anthropophuism, anthropopsychism, anti-brahminism, anti-clericalism, anti-communism, anti-federalism, anti-feminism, anti-judaism, anti-leninism, anti-normanism, anti-realism, anti-semitism, anticommunism, antielitism, antifeminism, antihumanism, antinatalism, antisemitism, antiterrorism, antiziganism, apochromatism, apoliticism, apollinarism, aposematism, apostolicism, apotropaism, arcadianism, aristotelism, arminianism, aromanticism, asiaticism, athanasianism, autoerotism, autohypnotism, automobilism, autosoterism, bacchanalianism, barbarianism, behavioralism, bibliophilism, bibliopolism, bicameralism, biomagnetism, bioterrorism, bipartisanism, bisexualism, bohemianism, brachycephalism, bradyspermatism, branchiomerism, breatharianism, bromoiodism, canadianism, catadicrotism, catatricrotism, centrifugalism, clinocephalism, coenobitism, collegialism, colloquialism, colonialism, coloquialism, cometabolism, compatriotism, confederalism, confessionalism, connexionalism, connubialism, consequentialism, conservativism, contextualism, continentalism, contractualism, contrarianism, controversialism, conventionalism, conversationism, copernicanism, corporativism, corporealism, cosmopolitism, counter-terrorism, counterterrorism, crypto-anarchism, crypto-calvinism, crypto-judaism, crypto-paganism, cyber-terrorism, cyberfeminism, cyberterrorism, cyrenaicism, czechoslovakism, darwinianism, deconstructionism, deconstructivism, defence mechanism, defense mechanism, deontologism, departmentalism, desert rheumatism, deteriorism, deviationism, dialecticism, diamagnetism, diathermanism, diatonicism, diluvianism, discordianism, dodecaphonism, dyophysitism, ebionitism, eco-socialism, eco-terrorism, ecocriticism, ecofeminism, ecomodernism, ecoterrorism, ectrodactylism, ecumenicism, eleaticism, electoralism, electrochromism, electromerism, electrotropism, elementalism, emanationism, emotionalism, encyclopaedism, epigrammatism, episcopalism, equestrianism, erythrochroism, escape mechanism, esotericism, etherealism, ethnocacerism, ethnopluralism, euro-scepticism, eurocommunism, europeanism, euroscepticism, eutychianism, evangelicism, evidentialism, evolutionism, exceptionalism, exhibitionism, existentialism, exotericism, ferrimagnetism, ferromagnetism, filibusterism, firing mechanism, foundationalism, fundamentalism, galvanotropism, geocentricism, geomagnetism, gladiatorism, governmentalism, grammarianism, gynocriticism, hegelianism, heliotropism, heteroecism, heterotopism, hibernianism, higher criticism, histrionicism, homoerotism, hyper-calvinism, hyperchromatism, hypercriticism, hyperdicrotism, hyperforeignism, hypergonadism, hypertelorism, hyperthyroidism, hypogonadism, hypoinsulinism, hypoptyalism, hypotelorism, hypothyroidism, iconophilism, idiologism, illuminatism, imperialism, indeterminism, industrialism, infantile autism, instrumentalism, insurrectionism, intentionalism, interactionism, interpretivism, interventionism, introspectionism, intuitionism, intuitivism, ipsedixitism, irrationalism, islamo-leftism, islamofascism, isocephalism, isolationism, johnsonianism, laestadianism, lamarckianism, laodiceanism, lexiphanicism, lower criticism, luciferianism, macedonianism, macroorchidism, mahometanism, malthusianism, manichaeanism, manorialism, materialism, matriarchalism, mercurialism, metachromatism, metamodernism, metasomatism, metempiricism, meteortropism, miaphysitism, microchimerism, microorchidism, microorganism, millennialism, millennianism, millenniarism, millenniumism, miserabilism, mohammadanism, mohammedanism, monarchianism, mongolianism, monochromatism, monodynamism, monoenergism, monolingualism, monometallism, monophysitism, monotheletism, monothelitism, monumentalism, moravianism, muhammadanism, multilingualism, multiracialism, municipalism, napoleonism, narcoterrorism, national-anarchism, neo-calvinism, neo-darwinism, neo-druidism, neo-feudalism, neo-futurism, neo-gramscianism, neo-hellenism, neo-platonism, neo-realism, neo-stalinism, neoclassicism, neocriticism, neofeminism, neologianism, neopaganism, neoplasticism, neoplatonism, neopragmatism, neoshamanism, neosocialism, neostoicism, neovitalism, neuromechanism, non-cognitivism, non-determinism, noncognitivism, nondeterminism, nonobjectivism, nonpartisanism, occasionalism, occidentalism, olympianism, operationism, organotropism, orientalism, originalism, ornamentalism, orthochromatism, overoptimism, paederoticism, palladianism, pan-africanism, pan-indianism, pan-nationalism, panbabylonism, pansexualism, pantagruelism, paragrammatism, parajournalism, paramagnetism, parametricism, parasigmatism, parasitoidism, parliamentarism, parochialism, particularism, patriarchalism, pedestrianism, pelagianism, pentadactylism, pentecostalism, perennialism, petty criticism, phenomenalism, philanthropinism, philo-semitism, photo-realism, photojournalism, photomagnetism, phrenomagnetism, pictorialism, plagiotropism, pleochromatism, pococurantism, poikilothermism, politicalism, polychromatism, polydactylism, polyeidism, polyorchidism, polytonalism, post-capitalism, post-consumerism, post-impressionism, post-postmodernism, post-romanticism, postconstructivism, postimpressionism, postminimalism, postnationalism, postpositivism, postsecularism, predeterminism, preferentialism, preformationism, preraphaelism, preraphaelitism, presentationism, primordialism, priscillianism, professionalism, prohibitionism, protoorganism, proverbialism, providentialism, pseudo-anglicism, pseudoskepticism, psychopannychism, quadrupedalism, quasi-realism, reconstructionism, reform judaism, republicanism, resistentialism, restorationism, resurrectionism, retributivism, retrofuturism, revolutionism, rosicrucianism, sabellianism, sacerdotalism, sacramentalism, saint-simonianism, samaritanism, sandemanianism, scaphocephalism, sectarianism, segregationism, self-cannibalism, self-determinism, semibarbarism, sensationalism, sentimentalism, separationism, servomechanism, sesquipedalism, situationism, socinianism, sociologism, somatotropism, sorelianism, spencerianism, state capitalism, steering mechanism, stereotropism, suicidalism, superorganism, supersessionism, supranaturalism, swedenborgianism, synchromysticism, techno-populism, technogaianism, televangelism, theatricalism, theoterrorism, thermomagnetism, third-wave feminism, thomsonianism, thromboembolism, totalitarism, traditionalism, transactionalism, transatlanticism, transcendentalism, transmedicalism, transnationalism, transsexualism, triangular prism, tricameralism, ultrafinitism, ultramodernism, ultramontanism, unicameralism, universalism, ureotelism, uricotelism, utilitarism, utopianism, vernacularism, vigilambulism, vocationalism, voltairianism, voluntaryism, wilsonianism, yellow journalism, zoroastrianism

7 syllables:
abstract expressionism, accelerationism, afro-surrealism, albigensianism, aleatoricism, amillennialism, anarcha-feminism, anarcho-communism, anarcho-naturism, anarcho-pacifism, anglo-catholicism, animal magnetism, annihilationism, anthropomorphitism, anti-capitalism, anti-catholicism, anti-consumerism, anti-italianism, anti-patriotism, anti-protestantism, anti-revisionism, anti-romanyism, anti-sovietism, antialcoholism, anticapitalism, anticlericalism, antimilitarism, antinomianism, antipositivism, antiquarianism, antisexualism, apheliotropism, apocalypticism, apogeotropism, assimilationism, associationism, atheroembolism, augustinianism, autodidacticism, autoeroticism, basal metabolism, bidialectalism, binitarianism, bioregionalism, bolivarianism, ceremonialism, chemical mechanism, ciceronianism, collaborationism, collyridianism, confederationism, configurationism, congregationalism, constitutionalism, cosmopolitanism, developmentalism, diageotropism, dispensationalism, doctrinarianism, dolichocephalism, eastern catholicism, ecclesiasticism, eco-capitalism, ecumenicalism, electro-magnetism, electro-vitalism, electromagnetism, eliminativism, empathy-altruism, enantiomerism, endocannibalism, environmentalism, epicureanism, evangelicalism, exocannibalism, experientialism, experimentalism, four-dimensionalism, gynodioecism, hamiltonianism, haredi judaism, heliocentricism, hemimetabolism, heteroerotism, holometabolism, homoeroticism, homonationalism, homosexualism, hyperadrenalism, hyperandrogenism, hypercatabolism, hypercortisolism, hyperestrogenism, hypergenitalism, hyperinsulinism, hypermetabolism, hyperparathyroidism, hypoadrenalism, hypochondriacism, hypoestrogenism, hypogenitalism, hypometabolism, hypoparathyroidism, iconoclasticism, illuminationism, immaterialism, incorporealism, individualism, institutionalism, intellectualism, internationalism, intersexualism, intuitionalism, judicial activism, katagelasticism, lusotropicalism, machiavellianism, managerialism, maritodespotism, marxism-leninism, mediaevalism, microgenitalism, millenarianism, muggletonianism, multicameralism, national socialism, necessarianism, neo-capitalism, neo-confucianism, neo-expressionism, neo-freudianism, neo-impressionism, neo-kantianism, neo-malthusianism, neo-nationalism, neo-ottomanism, neo-romanticism, neo-scholasticism, neo-sovietism, neo-surrealism, neocapitalism, neoconservatism, neoexpressionism, neofunctionalism, neoimpressionism, neoliberalism, neomercantilism, neonomianism, neopositivism, neoromanticism, non-interventionism, oneirocriticism, operationalism, ordoliberalism, orthodox judaism, osteolathyrism, palaeomagnetism, paleomagnetism, pan-americanism, paracelsianism, pastafarianism, patrimonialism, patripassianism, peripateticism, personal magnetism, pescetarianism, pestalozzianism, phalansterianism, photoperiodism, piezomagnetism, pollotarianism, porphyrogenitism, postcolonialism, postmaterialism, postmillennialism, pre-raphaelitism, premillennialism, presbyterianism, preternaturalism, pro-europeanism, probabiliorism, professorialism, proto-protestantism, pseudo-secularism, pythagoreanism, quartodecimanism, rastafarianism, reincarnationism, religious mysticism, roman catholicism, rotating mechanism, sedeprivationism, semi-arianism, sesquipedalianism, sexual fetishism, solifidianism, sublapsarianism, subordinationism, superdeterminism, supernationalism, supernaturalism, supranationalism, supra expressionism, techno-progressivism, territorialism, textual criticism, theophilanthropism, thermoperiodism, ultraconservatism, ultranationalism, un-americanism, unilalianism, unilateralism, unprofessionalism, valentinianism, verificationism

8 syllables:
anarcho-capitalism, anarcho-primitivism, anarcho-syndicalism, anti-americanism, anti-armenianism, anti-europeanism, anti-foundationalism, anti-imperialism, anti-mongolianism, anticolonialism, antiferromagnetism, apollinarianism, aristotelianism, associationalism, authoritarianism, autotrophic organism, complementarianism, conservative judaism, consociationalism, constructive metabolism, corpuscularianism, cyber-utopianism, denominationalism, destructive metabolism, diaheliotropism, egalitarianism, entrepreneurialism, epiphenomenalism, episcopalianism, heterosexualism, hyperaldosteronism, hypoaldosteronism, imaginationalism, infralapsarianism, intergovernmentalism, left-libertarianism, literary criticism, logical positivism, mediterraneanism, minoritarianism, names of god in judaism, neo-hegelianism, neo-imperialism, neo-orientalism, neocolonialism, neoconservativism, nontrinitarianism, paleoconservatism, philanthrocapitalism, pluricontinentalism, postmillenarianism, predestinarianism, pulmonary embolism, representationalism, right-libertarianism, semi-pelagianism, stereoisomerism, super-imperialism, superparamagnetism, supralapsarianism, totalitarianism, ultra-imperialism, utopian socialism, western esotericism

9 syllables:
anti-environmentalism, anti-individualism, anti-intellectualism, antikythera mechanism, attitudinarianism, biochemical mechanism, geolibertarianism, hyperadrenocorticism, hyperdispensationalism, hypoadrenocorticism, indigenous aryanism, latitudinarianism, neo-libertarianism, neopythagoreanism, pseudohypoparathyroidism, rugged individualism, semi-vegetarianism, singularitarianism, technolibertarianism, ultracrepidarianism, valetudinarianism

10 syllables:
anti-authoritarianism, gravitoelectromagnetism, interdenominationalism, paleolibertarianism, pseudohypoaldosteronism

11 syllables:
dialectical materialism, pseudopseudohypoparathyroidism