173 entries under persistent topic. ×

109
rigid(adjective, feature, state, characteristic, mean)
109
strong(adjective, calm, good, set, strong)
108
stable(adjective, calm, good, strong, hard)
101
unyielding(adjective, set, mean, clear, strong)
86
steadfast(adjective, feature, state, characteristic, calm)
84
consistent(adjective, strain, solid, certain, determined)
84
unfluctuating(adjective, calm, strong, secure, strain)
83
determined(adjective, good, set, clear, strong)
76
steady(adjective, feature, state, characteristic, calm)
75
resolute(adjective, calm, close, set, clear)
64
inflexible(adjective, mean, strong, hard, secure)
62
fixed(adjective, characteristic, calm, change, set)
62
stubborn(adjective, resolute, determined, uncompromising, obstinate)
62
constant(adjective, calm, good, close, strong)
62
fast(adjective, adverb, calm, close, strong)
54
immovable(adjective, mean, strong, hard, secure)
54
tight(adjective, close, strong, hard, free)
52
settled(adjective, characteristic, set, strong, secure)
50
set(verb, adjective, business, company, characteristic)
50
unbending(adjective, mean, clear, strong, hard)
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APASmart Define. (2016). firm thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/firm/thesaurus/synonyms
ChicagoSmart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, firm thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>.
MLASmart Define. "firm thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms>