891 entries under adjective topic. ×
| resistant(strong, tough, strain, fit) | |
| unshakable(mean, strong, hard, complete) | |
| solid(calm, good, close, set) | |
| staying(strain, firmness, labour, hardiness) | |
| impregnable(strain, true, firmness, constant) | |
| perpetual(strain, determined, familiar, steady) | |
| quiescent(strain, firmness, labour, hardiness) | |
| stabile(calm, strong, secure, strain) | |
| sustained(strain, firmness, persistent, continuous) | |
| conservative(moderate, strain, firmness, cautious) | |
| insistent(set, determined, steady, resolute) | |
| long-standing(strain, firmness, labour, hardiness) | |
| resilient(strain, firmness, labour, hardiness) | |
| stabilized(strain, firmness, labour, hardiness) | |
| tenable(strain, firmness, labour, hardiness) | |
| well-balanced(strain, firmness, labour, hardiness) | |
| abundant(strain, firmness, labour, hardiness) | |
| immune(strain, firmness, safe, labour) | |
| non-fluctuating(strain, firmness, labour, hardiness) | |
| proof(strain, firmness, labour, hardness) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |