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There are 886 eighteen-letter words containing A, E, 2H and O

(page 5)

pentakisphosphatesperoxodiphosphatesphaeochromocytomasphaeosphaeriaceousphaerochromocytomapharmacobehavioralpharmacochaperonespharmacomechanicalpharmacopathogenicpharmacophenotypespharmacotherapistspharyngoesophagealphenanthraquinonesphenophosphazininephenoxaphosphininephenylchlorosilanephenyldiazomethanephenylethanolaminephenylphenalenonespheochromocytomataPhiladelphia␣CountyphilanthropreneursPhilippine␣mahoganyphosphaadamantanesphosphatidylserinephosphoacetylationphosphodiesterasesphosphofluoridatesphosphogartrellitephosphoglucokinasephosphoglucomutasephosphoglucosaminephosphohexomutasesphosphomannomutasephosphometabolitesphosphometabolomicphosphomevalonatesphosphonodiamiditephosphonodithioatephosphonopentanoicphosphonopyruvatesphosphonoselenoatephosphopantetheinephosphopentomutasephosphoribomutasesphosphoribosylatedphosphorocyanidatephosphorodiamidatephosphorodithioatephosphorothiolatedphosphorothiolatesphosphorus␣cachexiaphosphorylceramidephosphorylcreatinephosphosaccharidesphosphotransferasephosphotransmitterphosphotriesterasephotochemical␣smogsphotoelectrographsphotographic␣memoryphotographic␣papersphotographic␣platesphotoimmunotherapyphotolithographersphotomicrographersphotophosphorylasephotoplethysmogramphotosyntheticallyphototherapeuticalphotothermoplasticphthirapterologistphycoerythrocyaninphysical␣geographerphysicochemicalismphysicomathematicsphysicotheologicalphysiogeographicalphysiopathogenesisphytohemagglutininphytohemaglutininephytopathogenicityphytotherapeuticalpick␣up␣the␣threads␣ofplays␣one's␣hand␣rightplay␣well␣with␣othersplay␣with␣house␣moneyplethysmographicalpockethandkerchief pocket-handkerchief pocket␣handkerchiefpolychemotherapiespolychromatophilespolyphosphorylatedpolyphthalocyaninepolyplethysmographpoor␣as␣a␣church␣mousepotato␣chip␣of␣the␣seapreached␣to␣the␣choirpreaches␣to␣the␣choirprephosphorylatingprephosphorylationprimary␣hypothermiaproazaphosphatraneprotoanthophyllitepseudoenophthalmospseudoexophthalmospseudohomothallismpseudophosphatasespseudophotographicpseudopsychopathicpseudorhombohedralpseudo-scholarshipspsychogeographicalpsychopathologizedpsychopathologizespsychopharmaceuticpsychophoneticallypsychotherapeuticspsychotherapeutistpsychrometric␣chartpteromerhanophobiaput␣hair␣on␣one's␣chestput␣through␣its␣pacespyrophosphokinasespyrophosphoramidespyrophosphorylasespyrophosphorylatedPythagorean␣theoremran␣barefoot␣throughRavensthorpe␣radishrechromatographiesrechromatographingred-shouldered␣hawksrenohistopathologyrephosphorylationsreproductive␣healthretinohypothalamicrheoencephalogramsrheoencephalographrheoplethysmographrhombicdodecahedra rhombic␣dodecahedrarhombicuboctahedrarhombidodecahedralrhombidodecahedronrhombitrihexagonalrhombododecahedralRichardson's␣theoremRichmond␣upon␣Thames

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