162 entries under determined topic. ×
| relentless(adjective, strong, tough, severe, continue) | |
| dogged(adjective, strong, tough, firm, energetic) | |
| pertinacious(adjective, strong, tough, continue, firm) | |
| unremitting(adjective, strong, continue, firm) | |
| tireless(adjective, strong, firm, energetic) | |
| obstinate(adjective, strong, tough, continue, firm) | |
| unflagging(adjective, strong, firm, certain) | |
| insistent(adjective, continue, resolute, demanding) | |
| unrelenting(adjective, tough, firm, certain) | |
| unwavering(adjective, strong, flat, firm, intense) | |
| incessant(adjective, strong, continue, firm) | |
| staunch(adjective, strong, tough, flat, firm) | |
| unfaltering(adjective, strong, firm, intense, deliberate) | |
| fixed(adjective, strong, tough, flat, firm) | |
| unceasing(adjective, strong, continue, firm) | |
| continuing(adjective, strong, continue, firm, certain) | |
| resolved(adjective, strong, flat, firm, certain) | |
| endless(adjective, continue, certain, steady) | |
| interminable(adjective, continue, steady, constant) | |
| unfailing(adjective, strong, continue, firm, certain) |
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| APA | Smart Define. (2015). persistent thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/persistent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "persistent thesaurus" https://smartdefine.org/persistent/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, persistent thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/persistent/thesaurus/synonyms>. |
| MLA | Smart Define. "persistent thesaurus" 1 June 2015. Web. 22 September 2026. <https://smartdefine.org/persistent/thesaurus/synonyms> |