Found 2 items, similar to corroboratory.
English → English (WordNet) Definition: corroboratory corroboratory adj : serving to support or corroborate; “collateral evidence” [syn: collateral, confirmative, confirming, confirmatory, corroborative, substantiating, substantiative, validating, validatory, verificatory, verifying]
English → English (gcide) Definition: Corroboratory Corroboratory \Cor*rob"o*ra*to*ry\ (-t?-r?), a. Tending to strengthen; corroborative; as, corroboratory facts. [1913 Webster]