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There are 796 twenty-one-letter words containing I, L, O and Y

(page 5)

neuropsychotoxicologyneuroradiographicallynew␣relationship␣energynitro-hydrochloric␣acidnitrosylsulphuric␣acidnoncharacteristicallynonconfigurationalitynoninterchangeabilitynonphenomenologicallynonphotosyntheticallynonrepresentationallynonstereospecificallynormotriglyceridaemianormotriglyceridaemicNorth␣Island␣eyebrightsnucleocytoplasmicallyobsessive-compulsivityoccipital␣horn␣syndromeoctamethyltrisiloxaneoligodeoxynucleotidesoligodesoxynucleotideolive-sided␣flycatchersonly␣Nixon␣can␣go␣to␣Chinaontoepistemologicallyopen␣circulatory␣systemophthalmodynamometricorganoautotrophicallyorganopolymerizationsorthophotographicallyosteoarchaeologicallyosteochondrodysplasiaosteochondrodysplasicotorhinolaryngologistoxyfunctionalizationsoxyiminocephalosporinpalaeohydrogeologicalpaleopolyploidizationPallister-Hall␣syndromepalmitoylethanolamidepalmitoyltransferasespalynostratigraphicalpara-acetylaminophenolparasympatheticolyticParkinson-plus␣syndromeparliamentary␣monarchypathological␣histologypenny␣wise,␣pound␣foolishpentaglycosylceramidePeople's␣Liberation␣Armypeptidopolysaccharideperhydroisoquinolinespharmaceutical␣companypharmacophylogenomicspharmacophysiologicalpharyngeal␣constrictorphenyldichloroarsinesphenyldiethanolaminesphenylethylmalonamidephenylisothiocyanatesphenyltrichlorosilanephosphatidylglyceridephosphatidylglycerolsphosphatidylinositidephosphatidylinositolsphosphatidylthreoninephosphoaminoglycosidephosphoribohydrolasesphotoaffinity␣labelingphotocolorimetricallyphotodecarbonylationsphotodecarboxylationsphotoelectrocatalysisphotoelectrocatalyticphotoelectrochemistryphotoelectrosynthesisphotoelectrosyntheticphotolithographicallyphotomicrographicallyphotophosphorylationsphotoplethysmographicphotothermoelasticityphthalylsulfathiazolephysicomathematicallyphysiologic␣dead␣spacesphysiopharmacologicalphysiotherapeuticallyphytohaemoagglutininsphytophenomenologicalpillars␣of␣the␣communitypin␣the␣tail␣on␣the␣donkeyplayed␣it␣close␣to␣the␣hipplaying␣one's␣cards␣rightplaying␣with␣house␣moneyplay␣into␣someone's␣handsplay␣one␣against␣anotherplay␣the␣hand␣one␣is␣dealtPlummer-Vinson␣syndromepoikilochlorophyllouspolitically␣correctingpolluter␣pays␣principlepollution␣permit␣systempolydimethylsiloxanespolyfunctionalizationpolypharmacologicallypolyphenylenevinylene polyphenylene␣vinylenepolyphosphoinositidespolysialogangliosidespolysialyltransferasepolysynthetic␣twinningpolyvinylpyrrolidonespositive␣polarity␣itemspossibility␣of␣reverterposterior␣spinal␣arteryposttranscriptionallypray␣to␣the␣porcelain␣godpreestablished␣harmony pre-established␣harmonypreliminarily␣enjoinedpreliminary␣injunctionpremenstrual␣dysphoriaPrincipality␣of␣AlbaniaPrincipality␣of␣Andorraprinciple␣of␣relativity

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 402 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 47 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 23 words

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