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There are 112 twenty-letter words containing I, 2O, R, S and 2U

absolute␣instructionsAlbertine␣sooty␣boubouAleutians␣East␣Boroughantiferroquadrupolesargument␣from␣illusionarteriovenous␣fistulaauricularis␣posteriorautomotive␣industriesautoradioluminogramsbismutohauchecornitebowmouth␣guitarfishesburning␣mouth␣syndromecalculus␣of␣variationscardiofaciocutaneousCassop-cum-Quarringtoncauliflower␣mushroomschequebook␣journalismchoice␣of␣forum␣clausescoimmunofluorescencecompensation␣culturescongratufuckulationsconspicuous␣consumersconstituent␣countriesconstitutional␣courtscontinuing␣resolutioncontinuity␣announcerscontinuous␣bag␣of␣wordscontinuous␣deliveriescorrugator␣superciliicounterrevolutionistcourse␣authoring␣toolscultural␣evolutionismdistribution␣functionendogenous␣retrovirusfamous␣for␣being␣famousfascioscapulohumeralforum␣selection␣clausefrequency␣modulationsglutton␣for␣punishmentgoing␣around␣the␣houseshepatocardiomuscularheterogeneous␣mixtureheterokurtosis-robusthydrodesulfurisationhydrodesulfurizationhyperimmunoglobulinsI'll␣see␣you␣and␣raise␣youimmunofluoropositiveimmunoneutralisationimmunoreconstitutionimmunosequestrationsIndustrial␣Revolutionintroductory␣subjectsI␣thought␣you'd␣never␣askking␣trumpet␣mushroomsmalicious␣prosecutionmechanicocorpuscularmediums␣of␣instructionneurovascularizationnonimmunosuppressantnonimmunosuppressivenucleopolyhedravirusnucleopolyhedrovirusobscurum␣per␣obscuriusobstruction␣of␣justiceone␣strike␣and␣you're␣outOusterhout's␣dichotomyoverimmunosuppressedphotomultiplier␣tubespleuroperipneumoniespolyradiculoneuritispoverty␣of␣the␣stimuluspseudopseudoseizurespseudotriangulationspseudouridinylationsPurification␣Rundownsput␣a␣bug␣in␣someone's␣earquattuordecillionthsradiculoneuropathiesradioimmunodiffusionreduction␣to␣the␣absurdRepublic␣of␣South␣Sudanrequest␣for␣productionrufous-backed␣antvireorunning␣roughshod␣overshoulder-of-mutton␣sailSouth␣Gloucestershiresouth-southeasterliessouth-southwesterliesstatutory␣authoritiesSturm-Liouville␣theorysubcommissural␣organssubstitution␣reactionsubsynchronous␣orbitssucked␣all␣the␣air␣out␣ofsuits␣down␣to␣the␣groundsun-synchronous␣orbitssurfaces␣of␣revolutionswings␣and␣roundaboutstauroursodeoxycholictumour␣necrosis␣factorturn␣around␣one's␣fingerultrarevolutionariesuniform␣distributionsUnited␣States␣of␣Europeuniversal␣opportunityUniversal␣Postal␣Unionuniversal␣product␣codeuniverses␣of␣discourseUtah␣roundmouth␣snailsWashington␣Court␣Houseyouthful␣indiscretion

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