Affirm
Affirm verb - To state as a fact usually forcefully.
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
Affirm is a synonym for certify in activity topic. You can use "Affirm" instead a verb "Certify", if it concerns topics such as speech, approve. popular alternative
Mutual synonyms
Cite this Source
Certify and Affirm. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/affirm/certify
Affirm & Certify. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/affirm/certify>.
Certify or Affirm. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/affirm/certify.
Google Ngram Viewer shows how "affirm" and "certify" have occurred on timeline