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There are 119 eighteen-letter words containing 2H, O and 2Y

analytic␣philosophybrachymesophalangybutyrylthiocholinechemosyntheticallycryohypophysectomycystourethrographycytohistochemistrycytohistopathologydiethylaminomethyldihydromethysticindihydrotachysteroldihydroxyanthronesdihydroxychalconesdiphenylhydantoinsdysrhythmogenicityergasiophygophyteserythrocytopathieserythrodysesthesiaerythroenzymopathyesthesiophysiologyethoxymethylidenesethylhydrocupreinefluoroethoxymethylhalohydroxylationshexadecyloxymethylhistocytochemistryhooray␣for␣Hollywoodhydrazide␣hydrazonehydroastrophyllitehydrogeochemicallyhydrogeomorphologyhydrolipophobicityhydrophenoxylationhydropolysulphideshydroxyamphetaminehydroxychloroquinehydroxycholesterolhydroxyhalolactonehydroxymethylationhydroxynaphthalenehydroxyphosphonatehydroxytryptophanshydroxywithanolidehyperglycorrhachiahyperlymphocytosishyperphosphorylatehyperphysiologicalhypersynchronizinghyperthyroxinaemiahyperthyroxinaemichyperthyroxinemiashypidiomorphicallyhypoparathyroidismhypophosphorylatedhypophysectomizinghysterographicallyhysteropingographyichthyoarchaeologyichthyoplanktologyisorhynchophyllineLesch-Nyhan␣syndromelymphocytapheresislymphohistocytosislymphoscintigraphymethoxycyclohexenemethoxytryptophansmethylcyclohexanesmethylcyclohexanolmethylotrophicallymicrobrachytherapymonohydroxymethaneneurophysiotherapyother␣days,␣other␣wayspachychoroidopathypharmacophysiologypharmacopsychiatryphotosyntheticallyphycoerythrobilinsphycoerythrocyaninphysiobiochemistryphytopathogenicityphytophenomenologyphytophototoxicityphytophysiognomiesphytophysiologicalplay␣with␣house␣moneypolychlorobiphenylpolyhydric␣alcoholspolyhydroxyphenolspolyphosphorylatedpolyphthalocyaninepolyplethysmographprimary␣hypothermiapsychic␣photographypsychohistoricallypsychopharmacologypsychophoneticallypsychophysiologistpsychoprophylacticpyrophosphorolysispyrophosphorolyticpyrophosphorylasespyrophosphorylatedpyrophosphorylysespyrophosphorylysispyrophosphorylyticShaughnessy␣playoffspondylarthropathysulphonylhydrazonesympathoinhibitorysymphony␣orchestrastheory␣of␣everythingthermohydrodynamicthough␣I␣say␣so␣myselfthyrohyoid␣membranetryptophan␣synthasewho's␣a␣pretty␣boy␣thenyou␣know␣what␣they␣sayzosterophyllophyte

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 20 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 4 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: no word

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