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

(page 6)

slaty-breasted␣tinamousSleeping␣Beauty␣problemsocial␣anxiety␣disorderSocial␣Democratic␣Partysocialism␣in␣one␣countrysocial␣security␣numberssociopsychoanalyticalsophrolaeliocattleyasSouthern␣lady's␣slippersspecific␣gravity␣bottlespectrobolometricallyspeculative␣philosophysphenomaxillary␣fossaesphygmomanometricallyspinal␣muscular␣atrophyspinoprezygapophysealspiny␣softshell␣turtlesspondyloarthropathiessqueaky␣wheels␣get␣oiledstatutory␣declarationssteady␣hand␣on␣the␣tillersteal␣someone's␣identitystereomicroscopicallystereophotomicroscopystereospecific␣polymerstewing␣in␣one's␣own␣gravysticks␣one's␣dick␣in␣crazystole␣someone's␣identitystorage␣polysaccharidestrict-sense␣stationarystriking␣someone's␣fancystrongylophthalmyiidssubsidiary␣legislationsubstoichiometricallysuccinic␣dehydrogenasesuccinylsulfathiazolesulfachloropyridazineSunday␣of␣the␣Five␣Loavessuperior␣thyroid␣arterysupernumerary␣rainbowsswallows␣the␣dictionarysyllabic␣abbreviationssympathetic␣detonationsympathetic␣vibrationssynchronization␣domainsyncytiotrophoblasticsyngenesiotransplantssystolic␣blood␣pressureTartarian␣honeysucklestawny-breasted␣tinamousTeddy␣Roosevelt␣Terriertelevision␣personalitytelevision␣receive-onlyten␣points␣to␣Gryffindortetraglycosylceramidetetrahydrocannabinolstetrahydrogestrinonestetrahydropyrimidinestetramethylrhodaminestheoretical␣physiciststhere's␣a␣lid␣for␣every␣potthermoviscoelasticitythiogalactopyranosidetickling␣someone's␣fancytight␣building␣syndrometolyltrichlorosilanestomodensitometricallytransactional␣analysestransactional␣analysistransendomyocardiallytransgalactosylationstranslating␣dictionarytranslation␣dictionarytransphosphorylationstrichloromethylsilanetrichothiodystrophiestrickle-down␣hypothesis trickle␣down␣hypothesistrifluoromethylationstrihydroxycholesteroltrimethylchlorosilanetriphenylchlorosilanetriphenylphosphoniumstrypanosusceptibilitytuberculous␣dactylitisTwelve␣Days␣of␣Christmastwenty-five-thousanderstwo␣ha'pennies␣for␣a␣pennytying␣oneself␣to␣the␣masttypewriter␣apostrophestypographic␣apostrophetyrannies␣of␣majoritiesunemployment␣insuranceupper␣respiratory␣tracturea-formaldehyde␣resinvanishing␣twin␣syndromevideofluoroscopicallyvinyl␣composition␣tilesvinyltrialkoxysilanesVirchow-Seckel␣syndromevoluntary␣aided␣schoolsvoluntary␣jurisdictionwalking␣corpse␣syndromewalking␣encyclopaediasWashington␣cherry␣treesWellhausen's␣hypothesisWest␣Riding␣of␣Yorkshirewhat␣do␣you␣want,␣a␣biscuitwhat␣is␣your␣phone␣numberwhistling␣face␣syndromewhitecoat␣hypertension white-coat␣hypertension white␣coat␣hypertensionwhite-gaped␣honeyeaterswho␣died␣and␣made␣you␣bosswild␣lilies-of-the-valley

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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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