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There are 121 eighteen-letter words containing 3I, O, 2P and S

amidinopiperidinesaminophospholipidsaminotripeptidasesantibioprophylaxisantipopulationistsapanthropinisationappellativizationsapplication␣domainsappointment␣diariesa␣promise␣is␣a␣promisebiophilosophicallybiophysiographicalbiopsychospiritualbird␣dropping␣spiderbisdioxopiperazineclipping␣the␣wings␣ofcritical␣philosophycryoprecipitationsdihydrosepiapterindiisopropanolaminediphosphoinositidedisproportionalitydisproportionatingdisproportionationdyslipoproteinemiaeditiones␣principeseosinophilopoiesiseosinophilopoieticepiphenomenalisticepiploic␣appendicesepitranscriptomicsfacies␣HippocraticafibrinosuppurativeglucosphingolipidsglycopeptidolipidsglycosphingolipidsGTP-binding␣proteinshapsidopareiontidshistoricoprophetichydroxypiperidineshypereosinophiliashyperoptimizationsimidoendopeptidaseimmunoprecipitantsimmunoprecipitatesinsipid␣schizotypalintraphilosophicalisopropylmalic␣acidkiller␣applicationskleptoparasitizinglipoprotein␣lipaseslongspine␣snipefishloose␣lips␣sink␣shipsmicrolepidopteristmicrowhip␣scorpionsminisupercomputingnanoprecipitationsneutrophilopoiesisnonsuppressibilityoccipitosphenoidalorthopneic␣positionpanhypopituitarismparish␣pump␣politicsparsimony␣principlepedophilic␣disorderpeptidoglycolipidsperipheralizationsperspectivizationsphilosophies␣of␣mindphosphonodiamiditephosphosensitivityphosphospecificityphotoperiodicitiespiezopsychrophilicpiperonylonitrilesplagiogravitropismplanning␣permissionpleuraspidotheriidpolitical␣prisonerspolydispersibilitypolydispersivitiespositional␣asphyxiapost-impressionismspostimpressionistspostmultiplicationpostprecipitationspredispositionallyprehospitalizationpremultiplicationsprime␣decompositionprior␣probabilitiespropositional␣logicproposition␣nationspropriosensitivityprospidium␣chlorideprovincial␣capitalspseudoappendicitispseudodiphtheriticpseudo-participialsputs␣lipstick␣on␣a␣pigpyrimidodiazepinespyropoikilocytosissalpingooophoritis salpingo-oophoritisshipping␣containerssociophilosophicalSophie␣Germain␣primesphingoglycolipidsspiroplectamminidssplit␣personalitiesState␣of␣Mississippisuperpositionalitysuperproficienciessupposititiousnesstenoepiphysiodesisthiophosphoric␣acidtin-pot␣dictatorshiptriisopropylsilanetriphosphoric␣acidstrivinylphosphinesUpper␣Assam␣Division

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