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There are 126 twenty-one-letter words containing A, C, D, H, I, R and Y

acetylcholine␣chloridealkyldihydroxyacetoneanaphylactoid␣purpurasarchaeopterodactyloidBhattacharyya␣distancebiohydrometallurgicalbiphosphoglyceric␣acidblack-billed␣flycatcherblack-tailed␣flycatchercarbamidomethylationscarboamidomethylationcarboxamidomethylatedcardioparasympatheticcardiotocographicallychemoradiosensitivityChiari-Frommel␣syndromechlorodeoxyadenosineschronopharmacodynamiccineangiocardiographycoordination␣chemistrycryptochlorogenic␣acidcuriosity␣killed␣the␣catcyclic␣redundancy␣checkcyclodehydrogenationsdacryocystorhinostomydeacetylcephalosporindecahydroisoquinolinedendrochronologicallydiabetic␣embryopathiesdichlorophenoxyaceticdihydroergocalciferoldihydroxyacetophenonedihydroxybenzoic␣acidsdihydroxysuccinic␣aciddirected␣acyclic␣graphsdirector␣of␣photographydocumentary␣hypothesisdynamo-electric␣machineechocardiographicallyelectrohydrodynamicalepidemic␣polyarthritiseverybody␣and␣his␣cousinexocellobiohydrolasesgeometrothermodynamicglycerophosphoric␣acidgo␣and␣play␣in␣the␣trafficGrand␣Duchy␣of␣Lithuaniahepatonephric␣syndromeheterobasidiomycetousheteropolysaccharideshighly-enriched␣uraniumhitting␣on␣all␣cylindershydraulic␣conductivityhydraulic␣Keynesianismhydroclimatologicallyhydrogeomorphologicalhydrostatic␣equilibriahydroxyergocalciferolhydroxyisovaleric␣acidhyperdiscriminabilityhyperthermoacidophilehypertriglyceridaemiahypertriglyceridaemichypertriglyceridemiashysterical␣blindnessesidiopathic␣hypersomniaLyminster␣and␣Crossbushlymphadenocarcinomatamagnetohydrodynamicalmagnetothermodynamicsmain␣character␣syndromemucopolysaccharidasesmucopolysaccharidosesmucopolysaccharidosismucopolysaccharidoticneuroradiographicallynitro-hydrochloric␣acidnitrosylsulphuric␣acidoccipital␣horn␣syndromeoctahydrocurcuminoidsolive-sided␣flycatchersophiocordycipitaceousophthalmodynamometricosteochondrodysplasiaosteochondrodysplasicovariohysterectomizedpachydermoperiostosispalaeohydrogeologicalparathyroidectomizingpeptidopolysaccharidephenyldichloroarsinesphosphatidylglyceridephosphatidylglycerolsphotodecarbonylationsphotodecarboxylationsphotodynamic␣therapiesplaying␣one's␣cards␣rightPotter-Bucky␣diaphragmspray␣to␣the␣porcelain␣godquantum␣chromodynamicsquasihyperarchimedianradioimmunochemicallyradiopharmaceuticallyradiophotographicallyrhamnopolysaccharidesSaturday-night␣specials Saturday␣night␣specialssialyloligosaccharidesialylpentasaccharidestorage␣polysaccharidesuccinic␣dehydrogenasesulfachloropyridazineswallows␣the␣dictionarysynchronization␣domainterephthaloyl␣chloridetetrahydrocannabinolsthiogalactopyranosidethrombendarteriectomytriacetoxyborohydridetrichloroacetaldehydeTwelve␣Days␣of␣Christmasvehicularly␣challengedvoluntary␣aided␣schoolswhistling␣face␣syndromeyellow-headed␣blackbird

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 73 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 12 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 2 words

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