Proof
Proof verb - Make resistant (to harm).
Usage example: proof the materials against shrinking in the dryer
Strengthen and proof are semantically related. In some cases you can use "Strengthen" instead a verb "Proof".
Strengthen
Strengthen verb - To increase the ability of (as a muscle) to exert physical force.
Proof and strengthen are semantically related. Sometimes you can replace term "Proof" with "Strengthen", this verbs are similar.
Nearby Words: strength, strengthening
Mutual synonyms
Cite this Source
Strengthen and Proof. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/proof/strengthen
Proof & Strengthen. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/proof/strengthen>.
Strengthen or Proof. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/proof/strengthen.
Google Ngram Viewer shows how "proof" and "strengthen" have occurred on timeline