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There are 743 twenty-one-letter words containing I, O, S and Y

abdominohysterotomiesabsorption␣dynamometerabsorption␣hygrometersaccidentally-on-purpose accidentally␣on␣purposeacetamidomethylationsacetylcholinesterasesacetylgalactosaminideacetylgalactosaminylsacetylglucosaminidaseacetylhexosaminidasesadmiral␣of␣the␣Swiss␣Navyadrenogenital␣syndromeadsorption␣calorimetryAlbertine␣sooty␣boubousalkylaminooxadiazolesalkylhydroperoxidasesallopolyploidisationsallopolyploidizationsalternative␣hypothesesalternative␣hypothesisaminoacyltransferasesaminopolycarboxylatesamplitude␣spectroscopyanalytic␣continuationsanaphylactoid␣purpurasAndean␣hairy␣armadillosangiotomodensitometryankylosing␣spondylitisanticonstitutionalityantipsychotherapeuticAnton-Babinski␣syndromearabinosyltransferasearginylaminopeptidase arginyl␣aminopeptidaseArgyll␣Robertson␣pupilsarseniuretted␣hydrogenasialogalactosylationAsian␣brown␣flycatchersAsk␣a␣Stupid␣Question␣Dayaspirational␣recyclingasteroseismologicallyasymptotic␣giant␣branchatomic␣force␣microscopyatypical␣antipsychoticautodephosphorylatingautodephosphorylationautophosphorylationalautopolyploidizationsaxiom␣of␣extensionalitybacteriohopanepolyolsbad␣money␣drives␣out␣goodbase␣station␣subsystemsbeat␣the␣daylights␣out␣ofbehavioural␣psychologybenzenedicarboxylatesbenzoylhydroxylaminesbenzyloxyphthalimidesBerk-Tabatznik␣syndromebiphosphoglyceric␣acidbisbenzylisoquinolinebrevity␣is␣the␣soul␣of␣witbrown-billed␣scythebillBruton's␣tyrosine␣kinasebury␣one's␣head␣in␣the␣sandbutyrylcholinesteraseCalifornia-style␣pizzascarbamidomethylationscardioparasympatheticcardiovascular␣systemscasualty␣of␣superioritycatastrophic␣mortalitycatching␣someone's␣fancycatch␣you␣on␣the␣flip␣sidechemoradiosensitivitychenodesoxycholic␣acidChiari-Frommel␣syndromeChinese␣Communist␣Partychlorodeoxyadenosineschlorotrimethylsilanecholecystographicallycholecystolithotripsycholedocholithotripsyclassical␣unemploymentclassification␣societyCode␣of␣Military␣Justicecombined␣braking␣systemcomes␣with␣the␣territorycoming␣up␣with␣snake␣eyescommand␣responsibilitycommon␣squirrel␣monkeyscommunion␣ecclesiologyCommunist␣Party␣of␣Chinacomputationally␣secureconjunctivorhinostomyconservatively␣correctcontinental␣philosophycontradictory␣antonymscontradistinctionallycoordination␣chemistrycoronary␣artery␣diseaseCoxeter-Dynkin␣diagramscraniopharyngiomatousCrigler-Najjar␣syndromecriminal␣psychologistscryptocrystallizationcrystal␣radio␣receiverscultural␣phylogeneticscuriosity␣killed␣the␣catcurse␣of␣dimensionalitycycloalkylcarboxylicscyclobisintercalatorscyclodehydrogenationscyclodeoxynucleosidescyclohexadepsipeptidecyclomaltodextrinasescyclooctadepsipeptidecyclotetramerizationscyclotomic␣polynomialscysteinyl␣leukotrienes

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 490 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 55 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 35 words

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