confirmatory adj. + Add to list US //kənˈfɝməˌtɔɹi// UK //kənfˈɜːmətəɹˌi// con·fir·ma·to·ry Synonyms Synonyms collateralconfirmativeconfirmingcorroborativecorroboratorysubstantiatingsubstantiativevalidatingvalidatoryverificatory