CERTIFY Synonyms: 100 Similar and Opposite Words

Q: 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

Q: 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

Q: 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

Q: 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

certify

verb

ˈsər-tə-ˌfī

Definition of certify next

as in to guarantee

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

Synonyms & Similar Words

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as in to enable

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

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Antonyms & Near Antonyms

as in to verify

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 & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

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

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of certify Its stops include five observatories, a planetarium, and a space museum, two state parks, and Saguaro National Park (which was certified as the newest Urban Night Sky Place in late 2023). —

Mark Ellwood, AFAR Media, 7 Feb. 2025 Raw milk sales are legal in Nevada, but there are no farms certified to sell it, according to the department. —

Jonathan Limehouse, USA TODAY, 6 Feb. 2025 This past year, more than 400 classic vehicles, restored and certified, were accepted. —

David Morgan, CBS News, 1 Feb. 2025 The three trainees are all experienced professionals who have been certified at other facilities, the agency added. —

Hannah Parry, Newsweek, 31 Jan. 2025 See all Example Sentences for certify

Recent Examples of Synonyms for certify

Verb

But there is still room for improvement, and the challenges that the league has faced in some markets are also bound to inform decisions on potential expansion — which is not guaranteed, but could come as soon as next season.

— Carol Schram, Forbes, 8 Feb. 2025
Therefore, quality and safety of supplements are not guaranteed.

— Patty Weasler, RN, BSN, Verywell Health, 8 Feb. 2025