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There are 165 twenty-one-letter words containing A, C, H, 3O and Y

anatomopathologicallyanthranoyllycoctonineappropriate␣technologyarchaeopterodactyloidatherothrombogenicitybacteriohopanepolyolsbehavioural␣psychologybroncho-oesophagoscopycarboamidomethylationcarbomonoxyhemoglobincarboxyhemoglobinemiacardiotocographicallychemolithotrophicallychenodesoxycholic␣acidchlorodeoxyadenosineschlorophenylhydrazonechlorotetrahydrofurancholecystogastrostomycholesterohydrothoraxchronopharmacodynamicchronopharmacotherapyclinicopathologicallycontinental␣philosophycoordination␣chemistrycraniopharyngiomatouscryptochlorogenic␣acidcyclodehydrogenationscyclophotocoagulationcytohistopathologicaldacryocystorhinostomydecahydroisoquinolinedendrochronologicallydichlorophenoxyaceticdihydroergocalciferoldihydroxyacetophenonedirector␣of␣photographyeducational␣psychologyelectrochromatographyelectromyoneurographyelectroneuromyographyeosinophil␣granulocyteethnoarchaeologicallyethnomethodologicallyexocellobiohydrolasesfetal␣alcohol␣syndromesfoetal␣alcohol␣syndromegeometrothermodynamicglobal␣workspace␣theoryglottochronologicallyglycerophosphoric␣acidglycerophosphorylatedhemlock␣woolly␣adelgidsheterobasidiomycetoushexachlorocyclohexanehexachlorocyclohexenehistomorphometricallyhydroclimatologicallyhydrogeomorphologicalhydroxyergocalciferolhyperbolic␣polynomialshypoelliptic␣operatorshypoproconvertinaemiaichthyoallyeinotoxismichthyoarchaeologicalichthyoplanktologicalichthyoplanktologistsinformation␣technologyinositolphosphoglycanisostoichiometricallyknock␣the␣daylight␣out␣oflaryngobronchoscopiesleucoerythroblastosismacrothrombocytopeniamacrothrombocytopenicmathematical␣sociologymethoxycarbonylationsmicroionophoreticallymicromorphometricallymicrothrombocytopeniamicroviscoamylographsmonodehydroascorbatesmorphophysiologicallymucopolysaccharidosesmucopolysaccharidosismucopolysaccharidoticmultimethodologicallymyocerebrohepatopathynanospectrophotometryneurobiopsychologicalneuropsychobiologicalneuropsychopathologicnitro-hydrochloric␣acidnonphenomenologicallynonphotosyntheticallynot␣know␣which␣way␣to␣turnoak␣processionary␣mothsoccipital␣horn␣syndromeoctahydrocurcuminoidsonly␣Nixon␣can␣go␣to␣Chinaophiocordycipitaceousophthalmodynamometricorganoautotrophicallyorthophotographicallyosteoarchaeologicallyosteochondrodysplasiaosteochondrodysplasicosteorhabdomyosarcomaovariohysterectomizedoxyiminocephalosporinpachydermoperiostosispalaeohydrogeologicalpathological␣histologypharmacophylogenomicspharmacophysiologicalpharyngoesophagectomypharyngoesophagoscopephosphoaminoglycosidephosphoglyceromutasesphotocolorimetricallyphotodecarbonylationsphotodecarboxylationsphotoelectrocatalysisphotoelectrocatalystsphotoelectrocatalyticphotolithographicallyphotomechanochemistryphotomicrographicallyphotoplethysmographicphotothermoelasticityphysiopharmacologicalphytophenomenological

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 40 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 1 word
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 1 word

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