338 entries under strong topic. ×
| dense(adjective, set, hard, tough) | |
| strict(adjective, close, hard, tough) | |
| devoted(adjective, good, close, correct) | |
| iron(noun, adjective, mean, hard) | |
| persevering(adjective, tough, certain, determined) | |
| positive(adjective, good, clear, complete) | |
| true(adjective, good, close, clear) | |
| unchangeable(adjective, calm, secure, moderate) | |
| rooted(adjective, hard, secure, property) | |
| concrete(verb, adjective, close, set, clear) | |
| dependable(adjective, good, close, tough) | |
| hard-nosed(adjective, mean, clear, hard) | |
| severe(adjective, clear, hard, tough) | |
| stalwart(adjective, calm, sound, tough) | |
| steely(adjective, hard, tough, solid) | |
| taut(adjective, hard, secure, rough) | |
| thick(adjective, close, hard, tough) | |
| abiding(adjective, calm, complete, secure) | |
| decisive(adjective, good, set, clear) | |
| immobile(adjective, calm, quiet, secure) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 26 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |