190 entries under fixed topic. ×
| immutable(adjective, calm, strong, hard, secure) | |
| pertinacious(adjective, strong, tough, determined, steady) | |
| set in stone(expression, adjective, idiom, calm, set) | |
| single-minded(adjective, tough, solid, intense, deliberate) | |
| unvarying(adjective, calm, strong, secure, solid) | |
| earnest(adjective, strong, severe, harsh, important) | |
| indomitable(adjective, strong, hard, tough, determined) | |
| unqualified(adjective, complete, total, solid, certain) | |
| unshaken(adjective, set, clear, solid, cold) | |
| concentrated(adjective, set, strong, hard, solid) | |
| strong-minded(adjective, certain, determined, significant, resolution) | |
| bent(adjective, set, intense, certain, deliberate) | |
| bound(adjective, set, strong, tough, intense) | |
| mulish(adjective, mean, strong, hard, tough) | |
| headstrong(adjective, hard, tough, rough, harsh) | |
| unmoved(adjective, calm, cold, indifferent, determined) | |
| balanced(adjective, calm, strong, secure, easy) | |
| committed(adjective, strong, determined, steady) | |
| hardened(adjective, set, strong, hard, tough) | |
| ironclad(adjective, set, hard, usual, regular) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |