275 entries under solid topic. ×

1
able(adjective, strong, sound, tough, easy)
1
annealed(adjective, hard, stiff, rigid)
1
ardent(adjective, close, correct, honest)
1
arthritic(adjective, hard, stiff, rigid)
1
athletic(strong, sound, tough, fit)
1
benumbed(adjective, hard, stiff, rigid)
1
brick-wall(adjective, calm, strong, secure)
1
buckram(adjective, hard, stiff, rigid)
1
caked(adjective, close, set, fix)
1
calcified(adjective, close, set, contract)
1
capable(adjective, strong, sound, tough, fit)
1
careful(adjective, good, strong, honest)
1
chilled(adjective, hard, stiff, rigid)
1
circumscribed(adjective, close, certain, short)
1
clabbered(adjective, set, heavy, deep)
1
clotted(adjective, set, heavy, deep)
1
coagulated(adjective, set, heavy, deep)
1
complete(adjective, clear, total, certain)
1
conglomerated(adjective, set, hardened, syrupy)
1
conscientious(adjective, good, close, strong, correct)
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APASmart Define. (2016). firm thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/firm/thesaurus/synonyms
ChicagoSmart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, firm thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>.
MLASmart Define. "firm thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms>