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There are 444 twenty-one-letter words containing H, I, O, S and Y

(page 3)

neuropsychobiologicalneuropsychopathologicneuropsychophysiologyneuropsychotherapistsneuropsychotoxicologynew␣relationship␣energynitrosylsulphuric␣acidnoncharacteristicallynonphotosyntheticallyNorth␣Island␣eyebrightsoak␣processionary␣mothsoccipital␣horn␣syndromeoctahydrocurcuminoidsoctamethyltrisiloxaneolive-sided␣flycatchersophiocordycipitaceousorthorhombic␣pyroxenesosteoarchaeologicallyosteochondrodysplasiaosteochondrodysplasicotorhinolaryngologistovariohysterectomizedoxyiminocephalosporinpachydermoperiostosisPallister-Hall␣syndromepalynostratigraphicalparasympatheticolyticpathological␣histologypenny␣wise,␣pound␣foolishpeptidopolysaccharideperhydroisoquinolinespharmacophylogenomicspharmacophysiologicalpharmacopsychiatristspharyngeal␣constrictorpharyngotympanic␣tubesphenyldichloroarsinesphenyldiethanolaminesphenylisothiocyanatesphenyltrichlorosilanephosphatidylglyceridephosphatidylglycerolsphosphatidylinositidephosphatidylinositolsphosphatidylthreoninephosphoaminoglycosidephosphoribohydrolasesphotodecarbonylationsphotodecarboxylationsphotodehydrogenationsphotodynamic␣therapiesphotoelectrocatalysisphotoelectrochemistryphotoelectrosynthesisphotoelectrosyntheticphotomechanochemistryphotophosphorylationsphotoplethysmographicphotothermoelasticityPhra␣Nakhon␣Si␣Ayutthayaphthalylsulfathiazolephysicomathematicallyphysicomathematiciansphysiologic␣dead␣spacesphysiopharmacologicalphysiotherapeuticallyphytohaemoagglutininspillars␣of␣the␣communityplayed␣it␣close␣to␣the␣hipplaying␣one's␣cards␣rightplaying␣with␣house␣moneyplay␣into␣someone's␣handsplay␣one␣against␣anotherplay␣the␣hand␣one␣is␣dealtpoikilochlorophyllouspolydimethylsiloxanespolyphosphoinositidespolysynthetic␣twinningpopping␣someone's␣cherryPotter-Bucky␣diaphragmspreestablished␣harmony pre-established␣harmonypremenstrual␣dysphoriaprotacanthopterygianspseudophosphorylationpsychological␣hedonismpsychological␣injuriespsychoneuroimmunologypsychopathophysiologypsychopharmaceuticalspsychopharmacologicalpsychopharmacologistspsychophysiologicallypsychotherapeuticallypsychotraumatizationspsychotraumatologicalpsychotraumatologistspurchasing␣power␣paritypyranonaphthoquinonespyrotechnic␣initiatorsquantum␣chromodynamicsRadishes␣and␣Gooseberryrespiratory␣bronchiolerespiratory␣therapistsreticulohistiocytomasreticulohistiocytosesreticulohistiocytosisreverse␣hyperextensionrhamnopolysaccharidesrides␣the␣cotton␣bicyclescientific␣methodologysclerochronologicallysee␣you␣in␣the␣funny␣pagesseleniuretted␣hydrogenshallow␣brooks␣are␣noisyShipton-by-BeningbroughShockley-Queisser␣limitshort␣twentieth␣centuryshunting-yard␣algorithmsialyloligosaccharidesing␣from␣the␣same␣hymnalsociopsychoanalyticalsophrolaeliocattleyasSouthern␣lady's␣slippers

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 287 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 43 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 15 words

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