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There are 739 eighteen-letter words containing A, E, H, 2O and Y

(page 4)

methylcyclopropanemethylotrophicallymethylpolysiloxanemicrohaemodynamicsmicrohydrogenationmicrohymenopteransmicrophanerophytesmolecular␣pathologymonoalphabeticallymonohydroxymethanemonomethylfumaratemonophenylbutazonemonophosphorylatedmonopisthocotyleanMoreton␣Bay␣chestnutmorphophonemicallymorphosemanticallymucopolysaccharasemucopolysaccharidemy␣car␣has␣broken␣downmycobacteriophagesmyconanotechnologymyeloarchitectonicmyeloradiculopathymy␣kingdom␣for␣a␣horsemyoepitheliomatousnanohydroxyapatitenasopharyngoscopesnematohydrodynamicneoglyphioceratidsneoichthyosauriansneurobehaviourallyneuroethologicallyneurolymphomatosisneuroophthalmology neuro-ophthalmologyneuropathogenicityneurophysiologicalneurophysiotherapyneuropsychodynamicneuropsychologicalneuropsychopathiesnonachlorobiphenylnoncholinergicallynonectomesenchymalnonheterosexualitynonhyperandrogenicnonpolysaccharidesno␣peace␣for␣the␣wearynorth-northeasterlynotoryctemorphiansoctachlorobiphenyloctadehydrocorrinsoctaethyleneglycolOld␣World␣flycatcheroligohymenophoreanoligohypomenorrheaoligoparaphenyleneOmphalos␣hypothesisophthalmotonometryopsonophagocytosedopsonophagocytosesorganoheterotrophyosteochondroplastyother␣days,␣other␣waysovariohysterectomyoverplayed␣one's␣handoxydehydrogenationoxygen␣catastrophesoxyhydroxysulfatesp-acetylaminophenolpaedopsychologicalpaedopsychologistspalaeoanthropology palæoanthropologypalaeobiochemistrypalaeobiogeographypalaeogeochemistrypalaeohydrogeologypalaeohydrographicpalaeohydrologicalpalaeohydrologistspalaeophycologicalpaleoanthropometrypaleochemotaxonomypaleogeomorphologypaleoichthyologistpaleophysiologicalpaleopsychologicalpanhypoproteinemiapanhypoproteinemicpapilioerythrinoneparapodiapophysealparathyroid␣hormonepellitory␣of␣the␣wallperturbation␣theoryphaeochromocytomasphaerochromocytomaphantom␣eye␣syndromepharmacogenotypingpharmacophenotypespharyngoepiglotticpharyngoesophagealphenomenologicallyphenylboronic␣acidsphenylchlorosilanepheochromocytomataphosphoacetylationphosphonopyruvatesphosphoribosylatedphosphorocyanidatephosphorylceramidephosphorylcreatinephotoallergenicityphotodegradabilityphotographic␣memoryphotoimmunotherapyphotophosphorylasephotoplethysmogramphotopolymerizablephotosyntheticallyphycoerythrocyaninphylotranscriptomephysicotheologicalphysiogeographicalphysiopathogenesisphytopathogenicityplastohydroquinoneplay␣the␣pronoun␣gameplay␣with␣edged␣toolsplay␣with␣house␣moneypneumocolonographypolychemotherapiespolychromatophilespolyendocrinopathypolyethercarbonatepolygon-circle␣graphpolymethoxyflavonepolymorphocellularpolymorphonuclearspolymorphonucleatepolypharmacologiespolyphenoloxidasespolyphosphorylatedpolyphthalocyaninepolyplethysmographpolysporangiophyteportal␣hypertensionpotassium␣hydroxidepour␣honey␣in␣one's␣ear

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 404 words
  • Spanish Wiktionary: 2 words
  • Italian Wiktionary: no word
  • German Wiktionary: 19 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 11 words

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