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There are 244 eighteen-letter words containing A, C, 2H, O and Y

achlorophyllaceousad-hoc␣polymorphismsalphacetylmethadolanalytic␣philosophyanaphylactic␣shocksanhydrosaccharidesanthropopathicallyanthroposophicallyanthropotechnologyantiarrhythmogenicapophthegmaticallyaptahistochemistryarachibutyrophobiaarchaeographicallyarchaeothanatologyaspidorhynchiformsbacteriopheophytinbatrachomyomachianbatrachomyomachiesBeals-Hecht␣syndromebiophilosophicallybiophysicochemical bio-physico-chemicalbiophysiographicalbiphosphoglyceratebrachylophosaurinsbrachymesophalangybronchopneumopathycarbamoylphosphate carbamoyl␣phosphatecarbamoylphosphinecardiosphygmographchemoimmunotherapychemoprophylacticschemosyntheticallychenodeoxycholatesChicago-style␣hot␣dogchlorarachniophytechloroacetaldehydechlorobenzaldehydechloroethoxyamineschlorohydrocarbonschloromethylationsChomsky␣hierarchieschondrodystrophiaschondromesenchymalchromoanasynthesischronochemotherapychronopharmacologychronostratigraphycritical␣philosophycyberethnographerscyberethnographiescyberphilosophicalcyclodecaphosphate cyclo-decaphosphatecyclodiphosphazenecystourethrographycytohistopathologydecachlorobiphenyldehydrochlorinasesdehydrochlorinateddihydroanthracenesdihydrotachysteroldihydroxychalconesdiphosphoglycerateecophilosophicallyelectrophotographyencephalomyopathicerythrocytopathiesethnopsychiatristsethnopsychologicalfirst␣catch␣your␣haregeophilosophicallyglycerolphosphatesglycerophosphataseglycerophosphatideglycolithocholatesgraph-theoreticallyheavy␣goods␣vehiclesheavy␣marching␣orderhelminthologicallyhermaphroditicallyhexachlorobiphenylhexadecyloxymethylhierarchy␣of␣effectsHieroglyphic␣Luwianhistophysiologicalhistoriosophicallyhomopolysaccharidehow␣much␣do␣you␣chargehydrencephaloceleshydrochlorinationshydroencephalocelehydrogeochemicallyhydromorphologicalhydrostratigraphichydrosulphuric␣acidhydroxyhalolactonehypercholesteremiahyperglycorrhachiahypermetamorphotichyperphosphataemichyperphysiologicalhypersophisticatedhypertechnologicalhyperthyroxinaemichypidiomorphicallyhypocholesteraemiahypochondroplasiashypochondroplastichypophosphoric␣acidhyposulphurous␣acidhypothalamectomieshysterographicallyichthyoarchaeologyichthyohaemotoxinsichthyophthiriasesichthyophthiriasisichthyoplanktologyichthyosarcotoxinsichthyosarcotoxismichthyosauromorphsimmunochemotherapylecithotrophicallyLesch-Nyhan␣syndromeleucencephalopathyleukencephalopathylipophosphoglycanslymphocytapheresislymphoscintigraphymacropetalichthyidmacrophanerophytesmechanographicallymethylcholanthrenemethylcyclohexanesmethylcyclohexanolmethylotrophicallymicrobrachytherapymicrophanerophytesmorphophonemicallynanochromatographyneoichthyosauriansneuropsychopathiesnonachlorobiphenylnonphilosophicallyoctachlorobiphenylophthalmologicallyorthopsychiatristsorthotypographicalpachycephalosauridpachychoroidopathypachyrhizodontoidspalaeohydrographic

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 71 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 9 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 7 words

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