corroborative
cor·ro·bo·rative
adjective
1.
serving to support or corroborate
- “collateral evidence”
Origin
From corroborate + -ive.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.