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There are 638 twenty-one-letter words containing I, L, S and Y

(page 4)

neurobiopsychologicalneuropsychoanalyticalneuropsychobiologicalneuropsychopathologicneuropsychophysiologyneuropsychotoxicologynew␣relationship␣energynitrosylsulphuric␣acidnoncharacteristicallynonphotosyntheticallynonrepresentationallynonstereospecificallyNorth␣Island␣eyebrightsnucleocytoplasmicallyobsessive-compulsivityoccipital␣horn␣syndromeoctamethyltrisiloxaneoligodeoxynucleotidesoligodesoxynucleotideolive-sided␣flycatchersontoepistemologicallyopen␣circulatory␣systemorganopolymerizationsosteoarchaeologicallyosteochondrodysplasiaosteochondrodysplasicotorhinolaryngologistoxyfunctionalizationsoxyiminocephalosporinPallister-Hall␣syndromepalmitoyltransferasespalynostratigraphicalparaphenylenediaminesparasympatheticolyticParkinson-plus␣syndromepathological␣histologyPennsylvania␣Dutchlandpenny␣wise,␣pound␣foolishpentaglycosylceramidePeople's␣Liberation␣Armypeptidopolysaccharidepeptidyl-glycinamidaseperhydroisoquinolinespharmacophylogenomicspharmacophysiologicalpharyngeal␣constrictorphenyldichloroarsinesphenyldiethanolaminesphenylisothiocyanatesphenyltrichlorosilanephosphatidylglyceridephosphatidylglycerolsphosphatidylinositidephosphatidylinositolsphosphatidylthreoninephosphoaminoglycosidephosphoribohydrolasesphotodecarbonylationsphotodecarboxylationsphotoelectrocatalysisphotoelectrochemistryphotoelectrosynthesisphotoelectrosyntheticphotophosphorylationsphotoplethysmographicphotothermoelasticityphthalylsulfathiazolephysicomathematicallyphysiologic␣dead␣spacesphysiopharmacologicalphysiotherapeuticallyphytohaemoagglutininspillars␣of␣the␣communityplayed␣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␣syndromepoikilochlorophyllouspolluter␣pays␣principlepollution␣permit␣systempolydimethylsiloxanespolyphosphoinositidespolysialogangliosidespolysialyltransferasepolysynthetic␣twinningpolyvinylpyrrolidonespositive␣polarity␣itemspossibility␣of␣reverterposterior␣spinal␣arteryposttranscriptionallypreestablished␣harmony pre-established␣harmonypremenstrual␣dysphoriaprobability␣amplitudespropargylestrenedioneprostatovesiculectomyProto-Malayo-Polynesianpseudophosphorylationpsychological␣hedonismpsychological␣injuriespsychoneuroimmunologypsychopathophysiologypsychopharmaceuticalspsychopharmacologicalpsychopharmacologistspsychophysiologicallypsychotherapeuticallypsychotraumatologicalpsychotraumatologistspterygomaxillary␣fossapterygopalatine␣fossaepublic␣key␣certificatespulmonary␣circulationspulmonary␣function␣testpulmonary␣tuberculosisreciprocity␣principlesrecursively␣enumerablerespiratory␣bronchiolereticulohistiocytomasreticulohistiocytosesreticulohistiocytosisrevolving-door␣syndrome revolving␣door␣syndrome

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 424 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 59 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 26 words

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