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There are 96 eighteen-letter words containing I, O, 3S and 2U

acoustic␣bass␣guitaracoustic␣guitaristsaqueducts␣of␣Sylviusautosuggestionistsautotransfusionistblood␣substitutionsbrush-tailed␣possumsbusiness-to-businessbusiness-to-consumerChersonesus␣Tauricaconjunctive␣tissuesconstructive␣trustsCosne-Cours-sur-LoirecounterenthusiasmscountersubversivescountersuggestionsCusick's␣biscuitrootdelusions␣of␣doublesdensonucleovirusesdesupersaturationsdispute␣resolutionsdouble␣first␣cousinsEsopus␣Spitzenburgsfluoroimmunoassaysfuture␣progressivesgranulation␣tissueshanging␣up␣one's␣spursimmunosuppressantsimmunosuppressionsimmunosuppressivesinsurmountablenessintersubstitutionsiron-sulfur␣clustersjumps␣to␣conclusionslabium␣superius␣orisluminoimmunoassaysmultifariousnessesmultisubstitutionsneuroconsciousnesson-base␣plus␣sluggingorthosubstitutionsoverobsequiousnessphilosophunculistsphotosubstitutionspilosebaceous␣unitspoststructuralismspoststructuralistsProto-South␣Sulawesipseudoenthusiasticpseudoinstructionspseudoleukocytosispseudoobstructionspseudotuberculosispulling␣one's␣socks␣uppulling␣up␣one's␣socksquasidistributionsquasisynchronouslyreligious␣humanistsrestructurisationsRuffini's␣corpusclessaturated␣solutionssexual␣intercoursesshoving␣it␣up␣your␣asssilicotuberculosissimsun␣permutationssimultaneous␣deathsspurious␣diphthongsspurious␣infectionsstochastic␣calculusstring␣substitutionstructuralisationsstrutting␣one's␣stuffsubordinate␣clausessudoriferous␣glandssudoriparous␣glandssuffering␣succotashsulpharsenious␣acidsuperconsciousness super-consciousnesssuperdistributionssuperferociousnesssuperinstantaneous super-instantaneoussupervaluationistssupposititiousnesssupraconsciousnessSussex␣pond␣puddingssustainable␣touristturned␣in␣successionUgandan␣discussionsunconstructivenessundersubscriptionsundisputatiousnessunostentatiousnessunquestionablenessYour␣Worshipfulness

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