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There are 93 twenty-letter words containing I, 3O and 3R

absorption␣hygrometeradrenocorticosteroidadrenocorticotrophicadrenocorticotrophinaround␣Robin␣Hood's␣barnastronomic␣refractionbolometric␣correctioncarcharodontosauriancarcharodontosauridscarcharodontosaurinecardiorenoprotectivecardiothoracic␣ratioscerebrofaciothoraciccerebromicroembolismcervicothoracolumbarcockpit␣voice␣recordercomprador␣bourgeoisiecordiform␣projectionscorporation␣aggregatecorrectional␣officerscorresponding␣authorscounterinterrogationcounterproliferationcounterrevolutionary counter-revolutionarycrowd␣control␣barrierscryptoviral␣extortioncycloprotoberberinesdihydroprogesteronesdirectly␣proportionalditetrafluoroboratesectomycorrhizosphereelectrocardioversionelectrochronographicelectrocorticographselectrocorticographyendogenous␣retrovirusenteroneuroendocrineerror␣of␣the␣second␣kindferriprotoporphyrinsferroprotoporphyrinsFile␣Transfer␣Protocolforeign␣correspondentgeometric␣progressionharmonic␣progressionsHarrod-Johnson␣diagramheterokurtosis-robusthydroxystaurosporineImperial␣stormtrooper Imperial␣Stormtrooperinterrogative␣pronounIQs␣of␣room␣temperatureisolation␣transformerlike␣there's␣no␣tomorrowLyme␣neuroborreliosismicroautoradiographsmicroautoradiographymicroelectrophoresesmicroelectrophoresismicroelectrophoreticmicrofluorocytometerMissouri␣gooseberriesnarrowing␣conversionsof␣Koranic␣proportionsorthographic␣neighbororthorhombic␣pyroxenePollard's␣rho␣algorithmposterior␣probabilityprofessores␣ordinariiprogressive␣overloadsradiochromatoscannerRaschig-Hooker␣processreciprocal␣proportionrenormalization␣grouprequest␣for␣productionretroperitoneoscopicretrotranspositionalrolls␣over␣in␣one's␣graverose-colored␣starlingsrose-coloured␣starlingrose-crowned␣fruit-doverunning␣roughshod␣overshort-circuit␣operator short␣circuit␣operatorsynchrotron␣radiationSyriac␣Orthodox␣Churchtetrafluoroboric␣acidtomorrow␣is␣another␣daytractor␣vaporising␣oiltumor␣necrosis␣factorstumour␣necrosis␣factorultraphotomicrographviscerobranchiomotor

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