Proof
Proof noun - Something presented in support of the truth or accuracy of a claim.
Supposition is an antonym for proof.
Supposition
Supposition noun - An idea that is the starting point for making a case or conducting an investigation.
How words are described
Cite this Source
Supposition and Proof. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/proof/supposition
Proof & Supposition. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/proof/supposition>.
Supposition or Proof. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/proof/supposition.
Google Ngram Viewer shows how "proof" and "supposition" have occurred on timeline