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There are 159 eighteen-letter words containing A, C, D, 2H and O

ad-hoc␣polymorphismsalarm␣clock␣headachealphacetylmethadolanhydrosaccharidesapplauded␣to␣the␣echoArkholme-with-CawoodaspidorhynchiformsBeals-Hecht␣syndromeboardinghouse␣reachbothriocephalideancame␣up␣with␣the␣goodscardiosphygmographcephalaspidomorphscephaloradiographschanging␣of␣the␣guardchenodeoxycholatesChicago-style␣hot␣dogchildren␣of␣the␣mansechildren's␣hospitalschitodisaccharideschloroacetaldehydechlorobenzaldehydechloroethanoic␣acidchlorohydrocarbonschlorophthalimidescholedochoduodenalchondrodystrophiaschondromesenchymalchromolithographedChurch-of-Englandismcold␣hands,␣warm␣heartcubohemioctahedroncyclodecaphosphate cyclo-decaphosphatecyclodiphosphazenedaughters␣of␣bitchesdecachlorobiphenyldehydrochlorinasesdehydrochlorinateddichloralphenazonedichlorophenarsinedihydroanthracenesdihydrotachysteroldihydroxychalconesdiphosphoglyceratedjadochtatherioidsDorchester-on-ThamesechinoclathriamideechocardiographersechocardiographiesechocardiographisteuchondrocephalansFedelm␣NoíchrothachFischer␣random␣chessglycerophosphatideGordie␣Howe␣hat␣trickhaemathamnolic␣acidham␣sandwich␣theoremhand␣in␣the␣cookie␣jarhandlebar␣moustachehave␣second␣thoughtsheath␣spotted␣orchidheavy␣goods␣vehiclesheavy␣marching␣orderhe␣could␣be␣her␣fatherheptakaidecahedronhermaphroditicallyheterodisaccharidehexachloroiridateshexadecyloxymethylhexakaidecahedronshexakisoctahedronsholding␣all␣the␣cardshomopolysaccharidehonored␣in␣the␣breachhousehold␣appliancehow␣much␣do␣you␣chargeHumboldt␣River␣Ranchhydrencephaloceleshydrochlorinationshydroencephalocelehydrogeochemicallyhydromorphologicalhydrostratigraphichydrosulphuric␣acidhydroxyhalolactonehypersophisticatedhypidiomorphicallyhypochondroplasiashypochondroplastichypophosphoric␣acidhyposulphurous␣acidideophonographicalisolithocholic␣acidLesch-Nyhan␣syndromemacropetalichthyidmajor␣seventh␣chordsmetaphosphoric␣acidmethanochondroitinméthode␣champenoisemitochondriopathicosteochondropathiapachycephalosauridpachychoroidopathypachyrhizodontoidspalaeohydrographicPhiladelphia␣Countyphonocardiographicphosphorocyanidatephosphorylceramidephosphosaccharidespick␣up␣the␣threads␣ofploughman's␣sandwichpockethandkerchief pocket-handkerchief pocket␣handkerchiefpolyhydric␣alcoholspolyphosphoric␣acidpreached␣to␣the␣choirpseudophotographicpseudopsychopathicpseudo-scholarshipspsychopathologizedpyrophosphoric␣acidradiochromatographreproductive␣healthrhombicdodecahedra rhombic␣dodecahedrarhombicuboctahedrarhombidodecahedralrhombidodecahedronrhombododecahedralRichardson's␣theoremRichmond␣upon␣ThamesSchensted␣algorithmschool␣of␣hard␣knocksSchwarzschild␣modelscratching␣one's␣headsecondary␣phosphinesodicanthophyllitespectrodichrograph

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 81 words
  • Spanish Wiktionary: 6 words
  • Italian Wiktionary: no word
  • German Wiktionary: 84 words
  • Portuguese Wiktionary: 4 words
  • Dutch Wiktionary: 85 words

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