266 entries under firm topic. ×

13
solid(adjective, set, strong, hard, sound)
12
sure(adjective, clear, strong, flat)
12
tight(adjective, adverb, close, strong, hard)
11
fastened(noun, verb, adjective, strong, sound)
11
frozen(adjective, calm, hard, solid)
11
set in stone(expression, adjective, idiom, mean, hard)
11
tenacious(adjective, strong, sound, secure, tough)
11
unbendable(adjective, determined, unreasonable, resolute)
10
abiding(adjective, strong, tough, flat)
10
intent(adjective, set, strong, complete, flat)
10
unfaltering(adjective, solid, certain, determined)
9
determinate(adjective, set, fine, thin)
9
dogged(adjective, mean, hard, tough)
9
durable(adjective, strong, sound, secure, tough)
9
limited(adjective, set, fine, thin)
9
mulish(adjective, mean, hard, determined)
9
secured(verb, adjective, strong, secure)
8
attached(adjective, secure, true, constant)
8
unflinching(adjective, strong, flat, certain)
7
entrenched(verb, adjective, set, complete)
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APASmart Define. (2016). fixed thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms
ChicagoSmart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, fixed thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>.
MLASmart Define. "fixed thesaurus" 16 March 2016. Web. 23 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms>