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There are 138 eighteen-letter words containing 4I, O, P and T

afroinsectiphilianallodiploidizationaminopropionitrileanarchoprimitivism anarcho-primitivismanarcho-primitivistangioscintigraphicantiplasticizationantiprohibitionistautodiploidizationbiocompatibilitiesbioincompatibilitybucodispersibilitychemospecificitieschoriocapillaritischromidotilapiinescompanionabilitiescompatibilizationsdepoliticalizationdespiritualizationdiphosphoinositidediplomatic␣immunitydiplomatic␣missionsdispersonificationdormitive␣principleeditiones␣principeselectrophilicitiesenantiospecificityeosinophilopoieticepithelializationsfishing␣expeditionsfive-point␣Calvinisthistioneutrophilichistocompatibilityhistoricopoliticalhyperacidificationhypoubiquitinationichthyophthiriasisidentification␣mapsidentity␣politicianimmunocapabilitiesimmunopurificationimperfectivizationimpermeabilizationimpersonificationsimplicit␣cognitionsincompossibilitiesinsipid␣schizotypalintercompatibilityinteroperabilitiesintrospectionisticirresponsibilitiesjoint␣probabilitiesLipschitz␣conditionliquidity␣providerslogical␣positivismslogical␣positivistsmachine␣politiciansmicroamplificationmicro-optimizationsmicroprecipitationmiscapitalisationsmiscapitalizationsmissionary␣positionmonodisciplinaritymultiparticipationmultiplication␣signneoimpressionisticoverpoliticizationoversimplificationpaleobiolinguisticPalestinianisationPalestinianizationparamilitarizationparticipializationperimineralizationperiodic␣inequalityphotoperiodicitiesphotosensitivitiespiezoresistivitiespillow␣dictionariespiscirickettsiosispissing␣into␣the␣windplatinichloric␣acidplurinationalitiesplurisignificationpolitical␣scientistpoliticohistoricalpolydispersibilitypolydispersivitiespolymerizabilitiespolyubiquitinatingpolyubiquitinationpolyvictimizationspositive␣transitionprestidigitatorialPrimitive␣Methodistprimitive␣recursionprior␣probabilitiesprobabilificationspro-circumcisionistpropriosensitivityprovincialisationsprovincializationsprovisionalizationpseudomilitaristicpsychocivilizationpublic␣intoxicationquadripartitioningqualifying␣positionquasiperiodicitiesquasiprobabilities quasi-probabilitiesradiation␣poisoningradiopacificationsreciprocitarianismregiospecificitiesreprimitivizationsRepublic␣of␣KiribatiresponsibilisationresponsibilizationseptenvigintillionSpanish␣InquisitionState␣of␣Mississippistibiopalladinitesstrict␣implicationssulphindigotic␣acidsupercivilisationssupercivilizationssuperficializationsympathoinhibitionterritorial␣pissingtext␣simplificationtipranavir␣disodiumtriazolopyrimidinetropodithietic␣acidviatorial␣privilegewrits␣of␣prohibition

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