Synonyms & Antonyms of certify

1 to declare (something) to be true or genuine
  • experts certified the letter as indeed having been written by Abraham Lincoln

Synonyms for certify

Words Related to certify

2 to give official or legal power to
  • certified her as a teacher

Synonyms for certify

Words Related to certify

Near Antonyms for certify

Antonyms for certify

3 to give evidence or testimony to the truth or factualness of
  • please bring in a doctor's note to certify that you were really sick

Synonyms for certify

Words Related to certify

Near Antonyms for certify

Antonyms for certify

See the Dictionary Definition 

Frequently Asked Questions About certify

How does the verb certify contrast with its synonyms?

Some common synonyms of certify are attest, vouch, and witness. While all these words mean "to testify to the truth or genuineness of something," certify usually applies to a written statement, especially one carrying a signature or seal.

certified that the candidate had met all requirements

When would attest be a good substitute for certify?

The meanings of attest and certify largely overlap; however, attest applies to oral or written testimony usually from experts or witnesses.

attested to the authenticity of the document

In what contexts can vouch take the place of certify?

In some situations, the words vouch and certify are roughly equivalent. However, vouch applies to one who testifies as a competent authority or a reliable person.

willing to vouch for her integrity

When could witness be used to replace certify?

Although the words witness and certify have much in common, witness applies to the subscribing of one's own name to a document as evidence of its genuineness.

witnessed the signing of the will

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Time Traveler for certify

Time Traveler

The first known use of certify was in the 14th century

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Cite this Entry

“Certify.” Thesaurus, Merriam-Webster, Accessed 22 May. 2022.

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More from Merriam-Webster on certify

Nglish: Translation of certify for Spanish Speakers

Britannica English: Translation of certify for Arabic Speakers


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