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There are 140 twenty-one-letter words containing A, C, D, H and 3O

archaeopterodactyloidaugmented␣sphenocoronaautohistoradiographicbacteriopheophorbidesbromodichloromethanescarboamidomethylationcarbonaceous␣chondritecarcharodontosaurianscarcharodontosaurinesCarcharodontosaurusescardiotocographicallycellooligosaccharideschemical␣decompositionchenodesoxycholic␣acidchitooligosaccharideschlorodeoxyadenosineschlorodifluoromethanechlorophenylhydrazonechlorotetrahydrofurancholesterohydrothoraxchorionic␣gonadotropinchronopharmacodynamiccitron-throated␣toucanscompact␣neighbourhoodscoordination␣chemistrycrooked␣as␣a␣dog's␣hind␣legcryptochlorogenic␣acidcyclodehydrogenationsdacryocystorhinostomydaggertooth␣pike␣congerdecahydroisoquinolinedendroanthracologicaldendrochronologicallydesulphoglucosinolatediathermocoagulationsdibromochloromethanesdichlorofluoromethanedichlorophenoxyaceticdichloroquinolinolatedihydroergocalciferoldihydroxyacetophenonedirector␣of␣photographyDoctor␣of␣Humane␣Lettersdodecicosidodecahedradumber␣than␣a␣box␣of␣rocksEastern␣Orthodox␣Churchectophosphodiesteraseeducational␣psychologyendocrinopathologicalerr␣on␣the␣side␣of␣cautionethnomethodologicallyexocellobiohydrolasesfetal␣alcohol␣syndromesfoetal␣alcohol␣syndromefructooligosaccharidegeometrothermodynamicglucooligosaccharidesglycerophosphoric␣acidglycerophosphorylatedHeegaard␣decompositionhemlock␣woolly␣adelgidsheterobasidiomycetousheterooligosaccharidehomogeneous␣coordinatehouses␣of␣accommodationhydroclimatologicallyhydrogeomorphologicalhydroxyergocalciferolicosihemidodecahedroninterhalogen␣compoundskleptochloroplastidicknocked␣into␣a␣cocked␣hatknocking␣on␣heaven's␣doorknock␣the␣daylight␣out␣ofMadonna-whore␣complexesmaltooligosaccharidesmannooligosaccharidesmarch␣to␣one's␣own␣drummermicroautoradiographicmonodehydroascorbatesmouse-colored␣antshrikemucopolysaccharidosesmucopolysaccharidosismucopolysaccharidoticmultimethodologicallynarrow-nosed␣rhinocerosnitro-hydrochloric␣acidnonchemoradioselectedNorth␣American␣wood␣apesoccipital␣horn␣syndromeoctahydrocurcuminoidsoligocellosaccharidesoligodendrogliopathicoligofructosaccharideoligoglucosaccharidesoligomannosaccharidesophiocordycipitaceousophthalmodynamometricosteochondrodysplasiaosteochondrodysplasicosteorhabdomyosarcomaovariohysterectomizedpachydermoperiostosispalaeohydrogeologicalpectooligosaccharidespharmacoepidemiologicPhilonian␣conditionalsphono-semantic␣compoundphosphoaminoglycosidephotodecarbonylationsphotodecarboxylationspray␣to␣the␣porcelain␣godpseudoachondroplasticpseudoanthropomorphicpseudomonosaccharidespseudooligosaccharidepsychological␣hedonismput␣on␣one's␣dancing␣shoesradiochromatoscannersradiophotographicallyradiophotoluminescentread␣someone␣the␣riot␣actRussian␣Orthodox␣Churchsecondary␣modern␣school

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