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There are 144 eighteen-letter words containing I, 2R and 2Y

alkylhydroperoxideAmerican␣pennyroyalarylhydroxylaminesbenzodihydropyransbiocrystallographybiohydrometallurgybishydroxycoumarincentrosymmetricitycirculatory␣systemscryopreservabilitycryoultramicrotomycryptocrystallinescrystal␣field␣theorycrystallochemistrycybervulnerabilitycytidyltransferasedehydrocorydalminedehydrodiconiferyldeoxyerythronolidediarylheterocyclicdihydropyrimidinesdihydrotachysteroldihydroxyacridinesdihydroxyanthronesdihydroxypteridinedipropyltryptamineDorian␣Gray␣syndromedynamic-link␣libraryelectrokaryotypingerythrocytopathieserythrocytopoiesiserythrodysesthesiaethylhydrocupreineevolutionary␣theoryextraembryonicallyferripyrophyllitesflipperty-floppertyfurylhydroquinonesglyceryl␣trinitrateglycyrrhetinic␣acidglycyrrhizinic␣acidhairy-soled␣conyratshydrazide␣hydrazonehydroastrophyllitehydrocarbonylationhydrocarboxylationhydroperoxyflavinshydroperoxylationshydroxybutyric␣acidhydroxycarotenoidshydroxychloroquinehydroxyderivativeshydroxykynurenineshydroxymaprotilinehydroxyperoxidaseshydroxypiperidineshydroxypyrimidineshydroxypyruvic␣acidhydroxystearic␣acidhydroxytryptamineshyperaggregabilityhyperallergenicityhyperandrogenicityhyperbolic␣geometryhyperbrachycranialhypercarbonylationhypercontractilityhypercontractivityhypergeometricallyhyperglyceridaemiahyperglycorrhachiahypernitrosylationhyperparasiticallyhypersynchronizinghypertheatricalityhyperthyroxinaemiahyperthyroxinaemichyperthyroxinemiashypertriglyceremiahypervulnerabilityhypoparathyroidismhysterographicallyhysteropingographyintraembryonicallyintraparenchymallyisoglycyrrhizinatejeremitayloricallyjudiciary␣astrologylabyrinthine␣arterylaryngopharyngitismacrocrystallinitymicrobrachytherapymicrocrystallinitymicrohydrodynamicsmicromegakaryocytemyocardiodystrophyneurophysiotherapynondihydropyridineovariohysterectomypalynostratigraphypharmacopsychiatrypharyngolaryngitespharyngolaryngitisphycoerythrobilinsphycoerythrocyaninpolyacrylonitrilesporphyrinogenicityprimary␣hypothermiaproprietary␣eponymsprosperity␣theologypterylographicallypyrazolopyrimidinepyrheliometricallypyrimidopyrimidinepyroelectrodynamicpyrophosphorolysispyrophosphorolyticpyrophosphorylysispyrophosphorylyticquaternary␣industryreality␣pornographyrespiratory␣systemsretrosyntheticallyribopuromycylationrotational␣symmetryspinal␣butterfly␣raystatutory␣authoritysupersymmetricallysyringohydromyeliatetrahydropyridinetheory␣of␣everythingtheory␣of␣relativitythermohydrodynamicthyrohyoid␣membranetinkerbell␣fairyflytrihydroxybenzenestrihydroxybenzoatetrihydroxystilbenetrimethylpyridinestrinary␣star␣systemsturribrachycephalyultracryomicrotomyunderhydroxylationyour␣mileage␣may␣vary

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 61 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 1 word
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: no word

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