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There are 83 eighteen-letter words containing A, D, 2H and 3O

ad-hoc␣polymorphismsaminophospholipidsArkholme-with-CawoodautophosphorylatedchenodeoxycholatesChicago-style␣hot␣dogchloroethanoic␣acidchlorohydrocarbonscholedochoduodenalchondrodystrophiaschromolithographedcubohemioctahedrondephosphonylationsdephosphorylationsdermatopathophobiadiphosphohydrolasediphosphorylationsdo␣more␣harm␣than␣gooddon't␣hold␣your␣breathEarth␣Overshoot␣Dayshalohydroxylationshomopolysaccharidehooray␣for␣Hollywoodhow␣much␣do␣you␣chargehydrochlorinationshydrohalogenationshydromorphologicalhydrophenoxylationhydrophosphinationhydroxyhalolactonehydroxyphosphonatehypochondroplasiashypochondroplastichypophosphoric␣acidhypophosphorylatedhyposulphite␣of␣sodaideophonographicalisolithocholic␣acidmethanochondroitinmitochondriopathicmonohydroxymethanemonophosphorylatedMorton␣and␣Hanthorpenon-Hodgkin␣lymphomaosteochondropathiaoxazaphospholidinepachychoroidopathypachyrhizodontoidsparathyroid␣hormoneperoxodiphosphatesphonocardiographicphosphofluoridatesphosphonodiamiditephosphonodithioatephosphoribosylatedphosphorocyanidatephosphorodiamidatephosphorodithioatephosphorothiolatedpolyhydric␣alcoholspolyphosphoric␣acidpolyphosphorylatedpseudoenophthalmospseudoexophthalmospseudohomothallismpseudophotographicpseudorhombohedralpsychopathologizedpyrophosphoramidespyrophosphoric␣acidpyrophosphorylatedradiochromatographrhabdodontomorphanrhombidodecahedronrhombododecahedralschool␣of␣hard␣knocksthat␣old␣dog␣won't␣huntthe␣wolf␣is␣at␣the␣doorthiophosphoric␣acidthiophosphorylatedvideo␣photographerswashed␣one's␣mouth␣outwhat␣has␣someone␣done

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 17 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 3 words
  • Portuguese Wiktionary: 2 words
  • Dutch Wiktionary: 4 words

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