891 entries under adjective topic. ×

19
reliable(calm, close, clear, strong)
19
unshakeable(determined, resolute, uncompromising)
18
adamantine(strong, hard, tough, determined)
18
certain(characteristic, good, change, clear)
17
definite(good, clear, strong, complete)
17
faithful(good, close, strong, correct)
16
dense(set, strong, hard, tough)
16
strict(close, strong, hard, tough)
15
unchanging(close, correct, moderate, severe)
14
devoted(good, close, strong, correct)
14
intent(set, intense, certain, deliberate)
14
iron(noun, mean, strong, hard)
14
persevering(strong, tough, certain, determined)
14
positive(good, clear, strong, complete)
14
true(good, close, clear, strong)
14
unchangeable(calm, strong, secure, moderate)
13
rooted(strong, hard, secure, property)
12
compact(verb, close, set, fix)
12
concrete(verb, close, set, clear)
12
dependable(good, close, strong, tough)
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APASmart Define. (2016). firm thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/firm/thesaurus/synonyms
ChicagoSmart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, firm thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>.
MLASmart Define. "firm thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms>