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There are 72 eighteen-letter words containing O and 3U

anonymous␣sculptureaqueducts␣of␣Sylviusargue␣round␣and␣roundargumenta␣ad␣populumautodeubiquinationautodeubiquitinateautothaumaturgistsautoubiquitinatingautoubiquitinationautoubiquitylatingautoubiquitylationbeautiful␣fruit␣dovecapitulotubercularcolourful␣bluetailscommutator␣subgroupcontinuous␣functioncounterculturalismcounterculturalistcultural␣diffusionsCultural␣Revolutiondouble-double-doubleelectroacupunctureEuropean␣PortugueseFu␣Manchu␣moustacheshomunculus␣argumenthydrosulfurous␣acidhyposulphurous␣acidinput-output␣sectioniron-sulfur␣clustersiron-sulphur␣clusterlabium␣superius␣orislaughing␣out␣of␣courtmultisubstitutionsmusculoaponeuroticmusculoligamentousmusculotegumentarymutual␣masturbationnonultrastructuralorthorubulavirusesosteoneuromuscularout-paramour␣the␣Turkoverscrupulousnesspluck␣up␣one's␣couragePortuguese␣Republicpseudodiverticulumpseudomultilocularpseudoneuropterouspseudotuberculosispustulocrustaceousquantum␣ferrofluidsquantum␣fluctuationreductio␣ad␣absurdumroughs␣up␣the␣bullpenSan␣Augustine␣Countyseminiferous␣tubuleskeletomusculaturestructural␣formulaestructural␣formulasstuck␣one's␣tongue␣outsubpoena␣duces␣tecumsuck␣out␣of␣one's␣thumbsulfur␣hexafluoridesupercounterfluidssuperior␣colliculustuberoinfundibulartubulointerstitiumundisputatiousnessunpresumptuousnessuntouchable␣numbersurban-rural␣communesxylofucoglucuronanyou␣couldn't␣make␣it␣up

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