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There are 1303 eighteen-letter words containing 2I, O, R, S and 2T

(page 4)

hepatic␣portal␣veinshepatopancreatitisheteroadministeredheteroantagonisticheteroassociationsheterocyclisationsheterocyclizationsheterodimerisationheteromultimerizesheteronormativismsheteropatriarchiesheteroscedasticityheteroskedasticityheterotransmissionHippocratic␣wreathshistioneutrophilichistoarchitecturalhistoarchitectureshistocytochemistryhistomorphometricshistomorphometrieshistomorphometristhistoricalizationshistoricopoliticalhistoricoprophetichistoriometricallyhit-or-miss␣transformHorsfield's␣tortoisehortisilviculturalhydroclimatologisthydrodistillationshydrostratigraphichyperalimentationshyperarticulationshyperdistributionshypernationalistichypernitrosylationhyperoptimizationshyperpigmentationshypersensitisationhypersensitizationhypersophisticatedhyperstabilisationhyperstabilizationhypertranscriptionhypertranspirationhypofractionationshyporeflectivitiesichthyophthiriasesichthyophthiriasisichthyosarcotoxinsichthyosarcotoxismignition␣interlocksignotum␣per␣ignotiusiliotrochantericusimitative␣harmoniesimmunodensitometryimmunodeterminantsimmunodistributionimmunopotentiatorsimmunoprecipitantsimmunoprecipitatesimmunoreactivitiesimmunorestorationsimmunorestorativesimmunotherapeuticsimmunotransmittersimportant␣bird␣areasinconstructibilityinconvertibilitiesindicator␣functionsindifferentiationsindirect␣quotationsindustrialisationsindustrializationsindustrial␣propertyinformation␣marketsinformation␣societyinformation␣systemsinjustice␣collectorinnominate␣arteriesin␣no␣uncertain␣termsinput␣method␣editorsinsectivorous␣plantinsertion␣reactionsinstitute␣professorinstitutionalisersinstitutionalizersinsurrectionalists Insurrectionalistsintegration␣by␣partsintegration␣testinginterarticulationsintercartilaginousintercistronicallyintercolumniationsintercommunalitiesintercommunicatorsinterconsultationsintercostobrachialinterdigitizationsinterferonopathiesinterinstitutionalinterlocking␣towersintermediate␣schoolintermetamorphosisinternal␣combustioninternal␣migrationsinternational␣acresInternational␣Fallsinternationalisinginternationalisticinternational␣milesinternational␣unitsinteroperabilitiesinterpretationistsinterpretation␣signinterrelationshipsinterreticulationsinterrogation␣marksintersectionalistsintersexualizationinterstereociliaryintersubstitutionsinterventionalistsintracartilaginousintrachloroplasticintracytoplasmaticintrainstitutionalintransitivizationintraperitoneouslyintraprostaticallyintrarelationshipsintroitus␣vaginarumintromittent␣organsintrospectionisticintrospective␣sortsintrusion␣fantasiesinverting␣functionsisoelectrophoreticisotopic␣signaturesisotransplantationjoint␣probabilitiesjunction␣transistorJunior␣CertificateskeratoelastoidosiskeratoprecipitateskilodisintegrationkinaesthesiometersKing-Armstrong␣units

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