Serving to support or corroborate.

synonyms: collateral, confirmative, confirming, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verificatory, verifying ... show more.

Roget 467: showing etc. v.; indicative, indicatory; deducible etc. 478; grounded on, founded on, based on; corroborative, confirmatory.    ... show more