127 entries under persistent topic. ×
| stiff(adjective, feature, state, characteristic, strong) | |
| firm(noun, adjective, feature, state, characteristic) | |
| inflexible(adjective, mean, strong, hard, tough) | |
| unyielding(adjective, mean, strong, hard, tough) | |
| stubborn(adjective, characteristic, quality, mean, strong) | |
| uncompromising(adjective, mean, hard, tough, severe) | |
| hard(adjective, feature, state, characteristic, mean) | |
| obdurate(adjective, strong, hard, tough, severe) | |
| unbending(adjective, mean, strong, hard, tough) | |
| determined(adjective, strong, hard, tough, severe) | |
| inexorable(adjective, mean, strong, hard, tough) | |
| resolute(adjective, tough, severe, firm, harsh) | |
| immovable(adjective, mean, strong, hard, secure) | |
| unrelenting(adjective, mean, strong, hard, tough) | |
| relentless(adjective, mean, strong, hard, tough) | |
| fixed(adjective, mean, hard, complete, secure) | |
| steadfast(adjective, feature, state, characteristic, secure) | |
| stable(adjective, secure, strain, firm, still) | |
| strict(adjective, good, strong, hard, tough) | |
| adamant(adjective, mean, strong, hard, tough) |
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| APA | Smart Define. (2015). rigid thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, rigid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>. |
| MLA | Smart Define. "rigid thesaurus" 3 August 2015. Web. 20 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms> |