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
Guarantee is a synonym for certify in obligation topic. In some cases you can use "Guarantee" instead a verb "Certify", when it comes to topics like verify, confirm, declare as true.
Guarantee
Guarantee verb - To assume responsibility for the satisfactory quality or performance of.
Usage example: the shop will guarantee all work done on the car for 30 days
Certify is a synonym for guarantee in obligation topic. You can use "Certify" instead a verb "Guarantee", if it concerns topics such as pledge.
Nearby Words: guaranteed, guarantor, guaranteeing
Mutual synonyms
Related pairs
Cite this Source
Guarantee and Certify. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certify/guarantee
Certify & Guarantee. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certify/guarantee>.
Guarantee or Certify. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certify/guarantee.
Google Ngram Viewer shows how "certify" and "guarantee" have occurred on timeline