Certify
Certify verb - To give evidence or testimony to the truth or factualness of.
Usage example: please bring in a doctor's note to certify that you were really sick
Declare is a synonym for certify in speech topic. In some cases you can use "Declare" instead a verb "Certify", when it comes to topics like confirm.
Mutual synonyms
Cite this Source
Declare and Certify. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certify/declare
Certify & Declare. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certify/declare>.
Declare or Certify. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certify/declare.
Google Ngram Viewer shows how "certify" and "declare" have occurred on timeline