14
partnership(noun, organization, business, company, thing)
14
persevering(adjective, strong, tough, certain, determined)
14
positive(adjective, good, clear, strong, complete)
14
true(adjective, good, close, clear, strong)
14
unchangeable(adjective, calm, strong, secure, moderate)
13
rooted(adjective, strong, hard, secure, property)
12
compact(verb, adjective, close, set, fix)
12
concrete(verb, adjective, close, set, clear)
12
dependable(adjective, good, close, strong, tough)
12
explicit(adjective, clear, complete, total, plain)
12
hard-nosed(adjective, mean, clear, strong, hard)
12
impenetrable(adjective, close, set, hard, solid)
12
inelastic(adjective, hard, tough, solid, determined)
12
outfit(noun, organization, activity, business, company)
12
peremptory(adjective, resolution, authoritative, overbearing)
12
severe(adjective, clear, strong, hard, tough)
12
stalwart(adjective, calm, strong, sound, tough)
12
steely(adjective, strong, hard, tough, solid)
12
stern(adjective, hard, tough, severe, rough)
12
taut(adjective, strong, hard, secure, rough)
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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>