5 letters:
-osis, aosis, cosas, dosis, locis, mosis, nosis, sosus, tosas

6 letters:
enosis, gnosis, kosice, miosis, otosis, prosus, ptosis, whosis

7 letters:
-biosis, -gnosis, artosis, croesus, cytosis, dulosis, ganosis, gaposis, gliosis, henosis, idrosis, kenosis, ketosis, limosis, meiosis, mimosas, mitosis, morosis, mycosis, oncosis, osmosis, ostosis, perosis, pilosis, porosis, pyrosis, rugosas, sorosis, sycosis, sylosis, tylosis, tyrosis, virosis, xerosis, zygosis, zymosis

8 letters:
acidosis, adiposis, ameiosis, amitosis, apodosis, chemosis, chylosis, cittosis, coniosis, curtosis, cyanosis, cyllosis, cyrtosis, diplosis, dipsosis, epulosis, fibrosis, fibrosus, formosus, gestosis, gryposis, gummosis, haplosis, hidrosis, hypnosis, kurtosis, kyllosis, leucosis, lordosis, macrosis, morosous, narcosis, necrosis, neurosis, osteosis, oxalosis, ozzmosis, peliosis, phimosis, phytosis, poliosis, psicosis, psorosis, ptilosis, pycnosis, pyknosis, rhigosis, sarcosis, semiosis, sialosis, stenosis, talcosis, uratosis, zoonosis

9 letters:
acariosis, alkalosis, amaurosis, amebiosis, anabiosis, anabrosis, anidrosis, ankylosis, aphthosis, argyrosis, arthrosis, ateliosis, athetosis, baritosis, biognosis, cheilosis, cirrhosis, diabrosis, diagnosis, dysbiosis, eccymosis, ekpyrosis, elastosis, empyrosis, enostosis, epibiosis, exosmosis, exostosis, fluorosis, geognosis, glaucosis, gloriosus, halitosis, hematosis, heterosis, hipgnosis, homoeosis, hypinosis, keratosis, kinetosis, kraurosis, lepidosis, lipidosis, lupinosis, madarosis, malacosis, mariposas, melanosis, mucinosis, nebulosus, nephrosis, onychosis, oomycosis, papulosis, perniosis, polyposis, prognosis, proptosis, psychosis, psygnosis, rhaebosis, rutidosis, sclerosis, scoliosis, selenosis, siderosis, spargosis, speciosus, splenosis, steatosis, stegnosis, strumosus, suberosis, symbiosis, symbiosys, symptosis, tabacosis, tapinosis, tephrosis, teratosis, toxicosis, trichosis, trombosis, typhlosis, urelcosis, uridrosis, vaginosis, varicosis, vibriosis, xanthosis

10 letters:
acanthosis, acarinosis, aerobiosis, allergosis, aluminosis, amoebiosis, anchylosis, anhidrosis, anhydrosis, antibiosis, antiptosis, apotheosis, asbestosis, asteatosis, ateleiosis, atrichosis, autognosis, babesiosis, bagascosis, bagassosis, baragnosis, barognosis, biocenosis, byssinosis, calcicosis, calcinosis, calculosis, candidosis, carcinosis, catabiosis, chalicosis, chaosmosis, chondrosis, coenurosis, coloptosis, cowdriosis, cystinosis, dermatosis, diorthosis, dysidrosis, dysostosis, ecchymosis, ectostosis, enantiosis, endosmosis, endostosis, erythrosis, exocytosis, galactosis, granulosis, haematosis, ichthyosis, kakidrosis, leucinosis, lipoidosis, marmarosis, marmorosis, ochronosis, osmidrosis, otomycosis, parabiosis, parostosis, phanerosis, pholidosis, phymatosis, pollenosis, pollinosis, ponderosas, pterylosis, pustulosis, pyroptosis, restenosis, rhytidosis, sequoiosis, sialidosis, sphrigosis, spongiosis, synostosis, telegnosis, tendinosis, tenostosis, thanatosis, thrombosis, topagnosis, topognosis, verrucosis

11 letters:
abarognosis, abarthrosis, acroagnosis, agalactosis, agranulosis, albuminosis, amyloidosis, anacoenosis, anacyclosis, anadiplosis, anaplerosis, anastomosis, anastylosis, anoxybiosis, anthracosis, aponeurosis, apotheosise, archebiosis, atopognosis, bacteriosis, basocytosis, berylliosis, biocoenosis, bionecrosis, borreliosis, bromidrosis, brucellosis, carotenosis, chemosmosis, chromatosis, cladoptosis, coccidiosis, demodicosis, dermostosis, dextrinosis, diarthrosis, donovanosis, dyshidrosis, dyskaryosis, emiocytosis, enarthrosis, endocytosis, endomitosis, fasciolosis, ferroptosis, fucosidosis, gliomatosis, gnotobiosis, homozygosis, hydatidosis, hyperinosis, iridoptosis, ischidrosis, keratonosis, keratonosus, lestobiosis, lipomatosis, listeriosis, lobomycosis, macrobiosis, melioidosis, metachrosis, metemptosis, metroptosis, monocytosis, myocardosis, myonecrosis, myxomatosis, myxomitosis, nearthrosis, necrobiosis, necroptosis, nocardiosis, nosomycosis, panmyelosis, parasitosis, paremptosis, pediculosis, periostosis, phalacrosis, pinocytosis, pleocytosis, pneumatosis, proemptosis, proteinosis, psittacosis, pyarthrosis, reticulosis, sarcoidosis, sarcostosis, shigellosis, silicatosis, sparganosis, spirillosis, spondylosis, syndesmosis, synneorosis, synoeciosis, synosteosis, syssarcosis, telangiosis, thesaurosis, thyroptosis, trichinosis, trifoliosis, uvuloptosis, yersiniosis, zygomycosis

12 letters:
achromatosis, acrocyanosis, adenomatosis, aeroneurosis, anaerobiosis, anaplasmosis, angiomatosis, anisocytosis, astrocytosis, autohypnosis, avitaminosis, bilharziosis, bromhidrosis, chemiosmosis, chromidrosis, cleptobiosis, colpoxerosis, craniostosis, cryptobiosis, distomatosis, dysarthrosis, dyskeratosis, ecchondrosis, ehrlichiosis, enterelcosis, enteroptosis, epanorthosis, fibromatosis, folliculosis, furunculosis, gastroptosis, geotrichosis, glossoptosis, glycogenosis, hallucinosis, hemarthrosis, hematidrosis, hemoconiosis, hidromeiosis, hyperidrosis, hyperostosis, hypohidrosis, karyomitosis, ketoacidosis, koilocytosis, lentiginosis, leptocytosis, leucocytosis, leukocytosis, loganamnosis, macrocytosis, mannosidosis, mastocytosis, mesodiplosis, microcytosis, misdiagnosis, mucormycosis, myelocytosis, myelomatosis, myosclerosis, necrocytosis, neoarthrosis, nephroptosis, nephropyosis, onychoptosis, osteoporosis, otosclerosis, pansclerosis, paradentosis, paradontosis, paraphimosis, phagocytosis, phakomatosis, phlyctenosis, phycomycosis, podoconiosis, polyadenosis, polyhedrosis, polyhidrosis, psychognosis, pylorodiosis, pyonephrosis, sarcomatosis, satellitosis, splenoptosis, stereognosis, synarthrosis, theileriosis, transcytosis, trogocytosis, trophobiosis, tuberculosis, uronephrosis, vasoneurosis, winnipegosis

13 letters:
acrosclerosis, actinomycosis, adenofibrosis, adiponecrosis, aflatoxicosis, aganglionosis, aleukocytosis, angioneurosis, angiostenosis, aspergillosis, astereognosis, atheromatosis, bartonellosis, blastomycosis, botryomycosis, carbunculosis, chromhidrosis, chromomycosis, colpostenosis, cyclarthrosis, cysticercosis, endometriosis, endosymbiosis, epanadiplosis, erythematosus, eurosclerosis, galactidrosis, glossopyrosis, haemarthrosis, haematidrosis, hemosiderosis, heterozygosis, histiocytosis, hydrarthrosis, hyperadenosis, hyperhidrosis, hyperhydrosis, hyperthecosis, hypomelanosis, hypothyreosis, hypotrichosis, karyopyknosis, karyostenosis, keratomycosis, legionellosis, leishmaniosis, leptospirosis, leukoaraiosis, lymphocytosis, lymphomatosis, maduromycosis, medionecrosis, metasomatosis, metrostenosis, mononucleosis, mucolipidosis, mycoplasmosis, mycotoxicosis, myelofibrosis, narcohypnosis, onchocercosis, onychomycosis, osteofibrosis, osteonecrosis, osteopetrosis, parakeratosis, paratrichosis, periodontosis, phytocoenosis, plasmacytosis, pneumocytosis, pneumomycosis, porokeratosis, radionecrosis, rectostenosis, rhaphanidosis, rhinonecrosis, rhinostenosis, rickettsiosis, salmonellosis, sarcocystosis, schizomycosis, self-hypnosis, serodiagnosis, spherocytosis, spirochetosis, synchondrosis, toxoplasmosis, trichomycosis, ureteropyosis, venosclerosis, visceroptosis, xanthomatosis, xenodiagnosis

14 letters:
acanthocytosis, acrodysostosis, acropustulosis, adenosclerosis, alymphocytosis, amphiarthrosis, arthrogryposis, blepharoptosis, bronchomycosis, carcinomatosis, chondromatosis, cryptococcosis, cytauxzoonosis, dacryostenosis, dermatomycosis, diverticulosis, echinococcosis, electroosmosis, elliptocytosis, enterostenosis, erythrocytosis, fibroelastosis, gangliosidosis, gastrostenosis, genodermatosis, granulocytosis, granulomatosis, haemosiderosis, heterokaryosis, histoplasmosis, hydronephrosis, hyperkeratosis, hypertrichosis, iridodiagnosis, isohypocytosis, kyphoscoliosis, leiomyomatosis, leukokeratosis, lipofuscinosis, lycoperdonosis, melorheostosis, metempsychosis, metensomatosis, mucoviscidosis, myeloblastosis, myelosclerosis, myospherulosis, onychogryposis, orthokeratosis, osteoarthrosis, osteosclerosis, papillomatosis, pasteurellosis, pharmacognosis, phlebostenosis, phlyctenulosis, pneumarthrosis, pneumoconiosis, pneumocystosis, poikilocytosis, proctostenosis, pseudarthrosis, psychoneurosis, pyelonephrosis, pyloristenosis, pylorostenosis, radiodiagnosis, sclerostenosis, self-diagnosis, siderofibrosis, spondylopyosis, sporotrichosis, stomatocytosis, thermoneurosis, thesaurismosis, thrombocytosis, thyrotoxicosis, treponematosis, trichinellosis, trichophytosis, trichoptilosis, trichosporosis, trophoneurosis, verticilliosis

15 letters:
agranulocytosis, amylopectinosis, apocolocyntosis, ariboflavinosis, atherosclerosis, bronchostenosis, bulbocavernosus, cardiosclerosis, cholesterolosis, choreoathetosis, coccidiomycosis, combat neurosis, craniosclerosis, cystic fibrosis, dactylogryposis, dermatophilosis, dermatophytosis, electro-osmosis, electronarcosis, erythrocyanosis, hemochromatosis, heterotrichosis, hypercementosis, hypergalactosis, hypovitaminosis, immunodiagnosis, isohypercytosis, laryngostenosis, lymphoblastosis, mycobacteriosis, myofibromatosis, nephrosclerosis, neurodermatosis, onychocryptosis, osteochondrosis, osteopoikilosis, pachydermatosis, pharyngomycosis, phlebosclerosis, phobic neurosis, pneumosilicosis, pseudoarthrosis, pseudosclerosis, psychodiagnosis, pycnodysostosis, reticulocytosis, reverse-osmosis, schwannomatosis, semimembranosus, silicosiderosis, splanchnoptosis, stomatonecrosis, tracheostenosis, ureterostenosis

16 letters:
anthropozoonosis, antituberculosis, anxiety neurosis, arteriosclerosis, autophagocytosis, blepharophimosis, chytridiomycosis, coxotuberculosis, craniosynostosis, dermatosclerosis, electrodiagnosis, enchondromatosis, epidermophytosis, erythroblastosis, granuloblastosis, haemochromatosis, hypervitaminosis, ischiocavernosus, micropinocytosis, nephrocalcinosis, nesidioblastosis, neuroborreliosis, neurosarcoidosis, osteopsathyrosis, paratuberculosis, phlebothrombosis, phospholipidosis, pneumonoconiosis, rhinosporidiosis, sarcosporidiosis, senile psychosis, sphingolipidosis

17 letters:
chondrocalcinosis, cryptosporidiosis, dyschondrosteosis, electroendosmosis, enteroanastomosis, eperythrozoonosis, gastroanastomosis, hemihyperhidrosis, hyperleukocytosis, leukocytozoonosis, maschalephidrosis, medical diagnosis, medical prognosis, neurofibromatosis, phaeohyphomycosis, silicoproteinosis

18 letters:
acrotrophoneurosis, alpha-mannosidosis, arterial sclerosis, arteriolosclerosis, campylobacteriosis, coccidioidomycosis, gastroenteroptosis, glomerulosclerosis, multiple sclerosis, neurocysticercosis, osteoradionecrosis, pseudotuberculosis, pyropoikilocytosis

19 letters:
cerebral thrombosis, chromoblastomycosis, coronary thrombosis, encephalitozoonosis, hysterical neurosis, lymphohistiocytosis, nephroblastomatosis, neuroacanthocytosis, osteochondromatosis, pancreatic fibrosis

20 letters:
lipodermatosclerosis, lymphangiomyomatosis, lymphogranulomatosis, nephroangiosclerosis

21 letters:
leukoerythroblastosis, mucopolysaccharidosis, pachydermoperiostosis, reticuloendotheliosis, reticulohistiocytosis, ureterohydronephrosis

22 letters:
acrokeratoelastoidosis, craniocleidodysostosis, disseminated sclerosis, paracoccidioidomycosis, pulmonary tuberculosis

23 letters:
schizophrenic psychosis

24 letters:
lymphangioleiomyomatosis

25 letters:
lipomucopolysaccharidosis

29 letters:
amyotrophic lateral sclerosis

5 letters:
moses

6 letters:
clovis