202 entries under firm topic. ×

13
reliable(adjective, calm, close, strong, secure)
13
unyielding(adjective, clear, strong, sound, tough)
12
indomitable(adjective, strong, determined, steady)
12
solid(adjective, calm, good, strong, sound)
12
sturdy(adjective, calm, strong, sound, tough)
12
tireless(adjective, strong, determined, steady)
12
tough(adjective, calm, clear, strong, sound)
11
immovable(adjective, set, strong, hard)
11
indefatigable(adjective, strong, tough, fit)
11
sound(noun, adjective, health, calm, strong)
11
stubborn(adjective, characteristic, quality, strong, tough)
11
trusty(adjective, good, close, strong, correct)
11
unflagging(adjective, strong, tough, fit)
10
courageous(adjective, determined, vigorous, noble)
10
fixed(adjective, strong, sound, tough, flat)
10
resolved(adjective, strong, certain, determined)
10
stable(adjective, good, strong, sound, tough)
10
sure(adjective, calm, good, close, strong)
10
trustworthy(adjective, good, close, strong, correct)
10
unflinching(adjective, strong, flat, certain)
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APASmart Define. (2015). staunch thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/staunch/thesaurus/synonyms
ChicagoSmart Define. 2015. "staunch thesaurus" https://smartdefine.org/staunch/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, staunch thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/staunch/thesaurus/synonyms>.
MLASmart Define. "staunch thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/staunch/thesaurus/synonyms>