177 entries under sturdy topic. ×
| abiding(adjective, calm, strong, complete, secure) | |
| changeless(adjective, solid, certain, stable, limited) | |
| set in stone(expression, adjective, idiom, calm, set) | |
| single-minded(adjective, tough, solid, intense, deliberate) | |
| unvarying(adjective, calm, strong, secure, solid) | |
| flinty(adjective, strong, hard, tough, severe) | |
| implacable(adjective, mean, strong, hard, tough) | |
| indomitable(adjective, strong, hard, tough, determined) | |
| unqualified(adjective, complete, total, solid, certain) | |
| unshaken(adjective, set, clear, solid, cold) | |
| hardy(noun, adjective, strong, sound, tough) | |
| heavy(adjective, set, strong, hard, sound) | |
| rugged(adjective, set, strong, hard, sound) | |
| mulish(adjective, mean, strong, hard, tough) | |
| rigorous(adjective, strong, hard, complete, tough) | |
| grim(adjective, strong, hard, tough, severe) | |
| harsh(adjective, mean, strong, hard, tough) | |
| impervious(adjective, set, strong, hard, tough) | |
| powerful(adjective, strong, sound, tough, fit) | |
| balanced(adjective, calm, strong, secure, easy) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 27 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |