Synonyms|86Antonyms|0|Broader|0Narrower|0Related|44
1
resistant
1
resistless
1
retardant
1
shatterproof
1
soundproof
1
steeled
1
steely
1
stony
1
tenable
1
thick-skinned
1
tight
1
unconquerable
1
uncooperative
1
unquenchable
1
unsubmissive
1
unyielding
1
up in arms(expression, idiom)
1
watertight
1
weatherproof
0
armed
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APASmart Define. (2015). proof against thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/proof_against/thesaurus/synonyms
ChicagoSmart Define. 2015. "proof against thesaurus" https://smartdefine.org/proof_against/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, proof against thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/proof_against/thesaurus/synonyms>.
MLASmart Define. "proof against thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/proof_against/thesaurus/synonyms>