177 entries under sturdy topic. ×
| able(adjective, strong, sound, tough, easy) | |
| ardent(adjective, close, correct, honest, solid) | |
| astringent(adjective, strong, hard, tough, severe) | |
| brick-wall(adjective, calm, strong, secure, solid) | |
| brick wall(expression, adjective, calm, strong, hard) | |
| capable(adjective, strong, sound, tough, fit) | |
| complete(adjective, clear, total, solid, certain) | |
| cruel(adjective, strong, hard, tough, severe) | |
| disciplinary(adjective, strong, hard, tough, severe) | |
| dyed-in-the-wool(adjective, close, set, strong, hard) | |
| entire(adjective, complete, total, solid, certain) | |
| equable(adjective, calm, strong, secure, solid) | |
| fit(adjective, strong, complete, tough, solid) | |
| forbidding(adjective, strong, hard, tough, severe) | |
| hard as nails(expression, adjective, idiom, set, strong) | |
| hefty(adjective, strong, hard, sound, tough) | |
| hunk(adjective, strong, hard, noble, substantial) | |
| insensible(adjective, strong, hard, tough) | |
| levelheaded(adjective, solid, stable, fixed) | |
| perdurable(calm, strong, tough, steady, even) |
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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> |