Certify
Certify verb - To declare (something) to be true or genuine.
Usage example: experts certified the letter as indeed having been written by Abraham Lincoln
Vouch is a synonym for certify in affirm topic. In some cases you can use "Vouch" instead a verb "Certify", when it comes to topics like attest, declare as true. popular alternative
Mutual synonyms
Cite this Source
Vouch and Certify. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certify/vouch
Certify & Vouch. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certify/vouch>.
Vouch or Certify. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certify/vouch.
Google Ngram Viewer shows how "certify" and "vouch" have occurred on timeline