Proof
Proof noun - Something presented in support of the truth or accuracy of a claim.
Sign
Sign noun - A movement of the body or limbs that expresses or emphasizes an idea or feeling.
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Synonyms for Sign
Proof is a synonym for sign in indication topic. Sometimes you can use "Proof" instead a noun "Sign", if it concerns topics such as symbol, token.
Mutual synonyms
How words are described
Both words in one sentence
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They take the lack of such a sign as proof that God has sanctioned the torture and mutilation that they will inflict on their classmates.
Source: Give Me a Sign - The implication is that they want proof you have a large enough army to do anything before they sign up.
Source: I Fight for the Strongest Side - It's riveting, and I have yet to see any proof that any of the characters are Mary Sues, a sign of a great story, especially since every character is original.
Cite this Source
Sign and Proof. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/proof/sign
Proof & Sign. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/proof/sign>.
Sign or Proof. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/proof/sign.
Google Ngram Viewer shows how "proof" and "sign" have occurred on timeline