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There are 652 eighteen-letter words containing A, C, I, L, O, S and Y

(page 4)

phytophysiologicalPittsylvania␣Countyplay␣one's␣cards␣rightplethysmographicalpoikiloblasticallypolicy␣interest␣ratepolyacrylonitrilespolychemotherapiespolychromatophilespolyesterificationpolyfunctionalisedpolygamma␣functionspolygamomonoeciouspolyhydric␣alcoholspolymolecularitiespolypharmacologiespolyphosphoric␣acidpolysomnographicalpolyvictimizationspostconceptionallypostdiagnosticallypostlinguisticallypostpsychoanalyticpotentiostaticallyprecompositionallyprecrystallizationpresymptomaticallypropagandisticallyprosopographicallyproteoaminoglycansprotocycloceratidsprotoplanetary␣discprotopsychologicalpseudoanaphylacticpseudobiologicallypseudoetymologicalpseudometaphysicalpseudomythologicalpseudopolycythemiapsychoacousticallypsychoanalyticallypsychobiographicalpsychobiologicallypsychocivilizationpsychocosmologicalpsychodermatologicpsychodramaticallypsychogeographicalpsychographologistpsychohistoricallypsycholinguisticalpsychological␣slipspsychologisticallypsychomanipulationpsychomanipulativepsychoneurologicalpsychoneuroticallypsychopathologicalpsychopathologistspsychopathologizedpsychopathologizespsychophoneticallypsychoprophylacticpsychosemanticallypsychosemioticallypsychosociologicalpsychostimulationspulmonary␣docimasiaquasisynchronouslyreconstitutabilityreconstructabilityrecrystallisationsrecrystallizationsreductionisticallyrestoration␣ecologyresyllabificationsreticulated␣pythonsreticulocytopeniasretinovasculopathyretrosyntheticallyrhamnosylglucosiderhamnosylglycosiderhinolaryngoscopessalpingoscopicallysalpingovariectomyschizoanalyticallysecessionisticallysecondary␣diagonalssecondary␣liabilitysedimentologicallysemiapologeticallysemibiographicallysemiconservativelyserodiagnosticallysialoglycopeptidessialoglycopolymerssialoglycoproteasesialoglycoproteinssialoglycoproteomesialoglycosylationsialylglycopeptidesialylglycopolymersialylglycoproteinsialyllactosaminessigillographicallysleeping␣dictionarysocial␣anthropologysocial␣psychologiessociopragmaticallysociopsychologicalsodicanthophyllitesoftware␣lifecycles software␣life␣cyclessomnambulisticallySouthwick␣and␣WidleyspectrographicallyspectroheliographyspectropolarimetryspirocycloheptanesspirocyclopentanesspirocyclopropanessplanchnocraniallyspondylodysplasticSpotsylvania␣Countystakeholder␣societystaphylococcicidalstationary␣bicyclesstatutory␣exclusionsteganographicallystereoisomericallystereospecificallystoichiometricallystratificationallysubcompositionallysublogarithmicallysubmicroscopicallysubtropical␣cyclonesucking␣donkey␣ballssulfonic␣anhydridessulfosalicylic␣acidsulphonic␣anhydridesuperagonisticallysuperphysiologicalsupraphysiologicalsurface␣etymologiessympatheticolyticssynapticulothecatesyncategorematicalsynchiotrophoblastsynctiotrophoblasttachistoscopicallyTaylor-White␣processtetrahydrocortisol

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 342 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 25 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 13 words

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