Hard
Hard adjective - Having or showing a lack of sympathy or tender feelings.
Proof against and hard are semantically related. In some cases you can use "Proof against" instead an adjective "Hard".
Proof against
Hard and proof against are semantically related. Sometimes you can use "Hard" instead an adjective phrase "Proof against".
Mutual synonyms
Cite this Source
Proof against and Hard. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/hard/proof_against
Hard & Proof against. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/hard/proof_against>.
Proof against or Hard. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/hard/proof_against.
Google Ngram Viewer shows how "hard" and "proof against" have occurred on timeline