104 entries under firm topic. ×
| unflagging(adjective, strong, certain, determined) | |
| unrelenting(adjective, tough, certain, determined) | |
| unwavering(adjective, strong, flat, intense) | |
| incessant(adjective, strong, continue, determined) | |
| staunch(adjective, strong, tough, flat) | |
| unfaltering(adjective, strong, intense, deliberate) | |
| fixed(adjective, strong, tough, flat) | |
| unceasing(adjective, strong, continue, determined) | |
| continuing(adjective, strong, continue, certain) | |
| resolved(adjective, strong, flat, certain) | |
| unfailing(adjective, strong, continue, certain) | |
| unflinching(adjective, strong, flat, certain) | |
| unswerving(adjective, strong, tough, determined) | |
| inflexible(adjective, strong, tough, flat) | |
| loyal(adjective, strong, certain, moral) | |
| obdurate(adjective, strong, tough, flat) | |
| persisting(adjective, strong, tough, determined) | |
| devoted(adjective, strong, determined, steady) | |
| immutable(adjective, strong, stable, constant) | |
| set(adjective, strong, tough, flat) |
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| APA | Smart Define. (2015). persistent thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/persistent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "persistent thesaurus" https://smartdefine.org/persistent/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, persistent thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/persistent/thesaurus/synonyms>. |
| MLA | Smart Define. "persistent thesaurus" 1 June 2015. Web. 20 September 2026. <https://smartdefine.org/persistent/thesaurus/synonyms> |