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There are 862 eighteen-letter words containing I, L, O, R, S and Y

(page 4)

monodispersabilitymonohydrochloridesmonohydroxylationsmonoisopropylaminemonophyletic␣groupsmorphosemanticallymucopolysaccharideller-Lyer␣illusionmurder␣your␣darlingsMurphy-Lane␣bone␣skidmycobacteriologistmyeloarchitecturesmyocardial␣infarctsmyofibrillogenesisnanodosimetricallyneoglyphioceratidsneurodysregulationneuroembryologistsneurolymphomatosisneurophysiologicalneurophysiologistsneuropsychobiologyneuropsychologicalneuropsychologistsNew␣Year's␣resolutionNew␣York-style␣pizzasNikolayevsk-na-Amurenitrobenzaldehydesnitroheterocyclicsnitrosalicylic␣acidnitrosylmyoglobinsnobiliary␣particlesnoncompressibilitynonheterosexualitynonintrospectivelynon-military␣servicenonphosphorylatingnonphosphorylationnonpolysaccharidesnonsuppressibilitynonterminal␣symbols non-terminal␣symbolsnontransferabilitynonunderstandinglynormophysiologicalnot␣in␣a␣million␣yearsnucleopolyhedrosisnylon-string␣guitarsoff␣like␣a␣dirty␣shirtoligodendrocytomasOlympic␣Winter␣Gamesopportunity␣classesOppression␣Olympicsordinary␣resolutionoscillographicallyotomicroscopicallyovercompensatinglyoverconservativelyoveridealisticallyoveroptimisticallyoverpsychologizingoversentimentalityoversimplisticallyoversusceptibilityoversystematicallyPaal-Knorr␣synthesispachycephalosauridpachypleurosauridsPaisley␣Undergroundpalaeobiochemistrypalaeobiodiversitypalaeogeochemistrypalaeohydrologistspalaeoparasitologypalaeozygopleuridspaleomyrmecologistpalynostratigraphyparaneoplasticallyparapodiapophysealparaprofessionallyparasympatholyticsparsimony␣principlepatristic␣anthologypepsinhydrochloricperitoneal␣dialysispersonality␣clashesphanerocrystallinephantasmagoricallypharmacophysiologypharyngealizationspharyngobranchialspharyngointestinalpharyngolaryngitespharyngolaryngitispharyngotonsilitisphenylboronic␣acidsphenylchlorosilanephilosophers␣by␣firephloroglucinolysisphosphatidylserinephosphoribosylatedphosphorylceramidephosphorylcholinesphosphorylcreatinephotoreversibilityphycoerythrobilinsphylobetadiversityphylostratigraphicphylotranscriptomephysical␣geographerphysiogeographicalphytomorphologistsphytoplanktivorouspiezopsychrophilicpiperonylonitrilesplastohydroquinoneplaying␣Nostradamusplay␣one's␣cards␣rightplays␣one's␣hand␣rightplay␣well␣with␣othersplethysmographicalpolicy␣interest␣ratepolyacrylonitrilespolychemotherapiespolychromatophilespolydispersibilitypolydispersivitiespolyesterificationpolyhydric␣alcoholspolymerizabilitiespolymerogenicitiespolymolecularitiesPolynesian␣Trianglepolypharmacologiespolyphosphoric␣acidpolysomnographicalpolysomnographistspolysporangiophytepolyvinylchlorides polyvinyl␣chloridespopular␣etymologiespopulation␣pyramidsportal␣hypertensionpositive␣neutralitypostpolymerizationpostranslationallyprecompositionallyprecrystallization

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 604 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 53 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 23 words

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