891 entries under adjective topic. ×
| immovable(mean, strong, hard, secure) | |
| tight(close, strong, hard, free) | |
| uncompromising(mean, clear, hard, secure) | |
| settled(characteristic, set, strong, secure) | |
| durable(calm, strong, sound, secure) | |
| set(verb, business, company, characteristic) | |
| unbending(mean, clear, strong, hard) | |
| enduring(calm, close, strong, sound) | |
| stout(calm, strong, sound, tough) | |
| permanent(calm, strong, secure, tough) | |
| unalterable(characteristic, calm, strong, hard) | |
| inexorable(mean, strong, hard, tough) | |
| obdurate(strong, hard, secure, tough) | |
| refractory(hard, strain, rough, harsh) | |
| lasting(calm, strong, secure, tough) | |
| stationary(strain, stable, firmness, labour) | |
| unwavering(calm, close, strong, secure) | |
| intransigent(determined, resolute, obstinate, stubborn) | |
| invariable(calm, strong, secure, strain) | |
| robust(strong, hard, sound, complete) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 24 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |