The Collaborative International Dictionary
Corroboratory
Corroboratory \Cor*rob"o*ra*to*ry\ (-t?-r?), a. Tending to strengthen; corroborative; as, corroboratory facts.
Wiktionary
corroboratory
a. Serving to corroborate or strengthen
WordNet
corroboratory
adj. serving to support or corroborate; "collateral evidence" [syn: collateral, confirmative, confirming, confirmatory, corroborative, substantiating, substantiative, validating, validatory, verificatory, verifying]
Usage examples of "corroboratory".
Besides, if Forte did die in that crash, if there was a crash, we'll be able to provide corroboratory evidence to that effect.
Once Ames said, perhaps to break the tension of waiting, "How could they be sure of picking up this Struthers, from the next estate down the road, so they'd have an outside, corroboratory witness?