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There are 3850 twelve-letter words containing 2I and 2O

abhominationabiotrophiesabolitionaryabolitiondomabolitioniseabolitionismabolitionistabolitionizeabominationsabortionistsabortion␣millabortion␣pillabsorbitionsaccomplitionaccordioningaccordionistacidobionticacidochromicacidophilousacidotrophicacridivorousacridologistacrostichoidactinobolismactinoceroidactinodontidactinologistactinomyosinactinophonicactinopodidsactinoporinsactinoquinolactinorhodinactinosporinactinostolidaction␣moviesaction␣pointsactivity␣bookaddictologicadelphopoiiaadenovirionsadipomyokineadiponectionadmonitionaladmonitioneradmonitorialadmonitorilyadnominationadoptionistsadpositionalAdrianopolisaeolothripidaerobiologicaeromoniasisaerosolisingaerosolizingaetiological ætiologicalaetiologists ætiologistsaetiologizedaetiologizesafficionadosaficionadoesAfricologistafricoonians Africooniansafrosoricidsagnominationagonizationsagricolationagriologicalagriologistsagrobiologicagrocinopineaichmophobiaailourophileailourophilsailurophobiaailurophobicailuropodineailuropodinsair-conditionair␣corridorsair␣pollutionalcoholicityalcoholisingalcoholizingaldobiuronicaldolizationalienologistaliquotationalligatoroidallodiploidsallogromiidsalloisomericallotriploidalto-rilievosamaurobioidsambiophonicsambipositionameliorationamicroscopicaminobenzoicaminocaproicaminoindanolaminoquinoneaminoribosylaminosteroidammoniaporinammoniationsammoniotelicammonisationammonizationammoxidationamniochorialamniochorionamnioscopiesamortisationamortizationamphibiologyamphibologiaanaerobiosisanaerobioticancorinosideandrogonidiaanginophobiaangiofibromaangiogliomasangiolipomasangiologicalangiologistsangiomatosisangiomodulinangiopoiesisangiopoieticangiopoietinangioproteinangiostomiesangiotensionangiotrophicAngolizationanionizationanionotropicanisochromiaanisochronicanisocytosisanisoeikoniaanisomorphicanisotropiesanisotropineanisotropismannominationanodizationsanorthositicantepositionantiabortion anti-abortionantiadoptionantibloominganticolonialanticolonistanticortisolantieconomicantifloodingantihooliganantihorizonsantimosquitoantimotoristantimyotonicantimyotoxicantioxytocicantioxytocinantiphotinosantiprotonicantirotationantisnoopingantisolitonsantispoofingantivolitionapeirophobiaaphidivorousaphidologistaphroditoidsaphysiologicapidologicalaplocheiloidaplochitonidaplodontiidsapodisationsapodizationsapoposeidionaporphinoidsaposiopesticapostolicismapostolicityapostolisingapostolizingaposymbiosisaposymbioticapportioningappositionalappositionedapprovisionsApril-foolingarabinobiosearboricolinearborizationarenonium␣ionaristolochicaristolochinaristologistarrhizotonicascidiozooidascoconidiumAscoli␣Picenoassociationsasteriotoxinastrocoeniidastrogliosisastroglioticatomic␣fusionatomisationsatomizationsatoroidalityatoxicogenicaudiologicalaudiologistsautocitation

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