Synonyms of proof

proof

noun

ˈprüf 

as in evidence

something presented in support of the truth or accuracy of a claim

she presented proof that she had not cheated

Synonyms & Similar Words

• evidence
• testimony
• documentation
• testament
• testimonial
• confirmation
• witness
• validation
• corroboration
• substantiation
• attestation
• document
• voucher
• certificate
• demonstration
• (the) goods
• verification
• identification
• exhibit
• manifestation
• illustration
• authentication

Antonyms & Near Antonyms

• refutation
• rebuttal
• disproof
• charge
• allegation
• accusation
• assumption
• presumption
• suspicion
• conjecture
• guess
• surmise

Example Sentences

Recent Examples of proof

So to evaluate the system outside the laboratory, the xEnergy team carried out several proof-of-concept (PoC) projects with industrial partners. — Rupendra Brahambhatt, Interesting Engineering, 4 July 2026

Your retailer, Michael Kors, is hiding behind a questionable proof-of-delivery photo and appears to be ignoring UPS’s own investigation results. — Christopher Elliott, Mercury News, 3 July 2026

Some detainees at Camp East Montana who showed signs of potential self-harm were placed in isolation rooms that were not suicide-proof. — Perla Trevizo, ProPublica, 3 July 2026

Why the Science Still Lags the Marketing Adoption is running ahead of proof. — Samantha Agate, Charlotte Observer, 3 July 2026