corroborative adj. + Add to list US //kɝˈɑbɝəˌtɪv// UK //kəɹˈɒbɹətˌɪv// cor·rob·o·ra·tive Archaic Synonyms Synonyms collateralconfirmativeconfirmatoryconfirmingcorroboratorysubstantiatingsubstantiativevalidatingvalidatoryverificatory