93 entries under strong topic. ×
| dogged(adjective, tough, firm, energetic) | |
| pertinacious(adjective, tough, continue, firm) | |
| unremitting(adjective, continue, firm, determined) | |
| tireless(adjective, firm, energetic, determined) | |
| obstinate(adjective, tough, continue, firm) | |
| unflagging(adjective, firm, certain, determined) | |
| unwavering(adjective, flat, firm, intense) | |
| incessant(adjective, continue, firm, determined) | |
| staunch(adjective, tough, flat, firm) | |
| unfaltering(adjective, firm, intense, deliberate) | |
| fixed(adjective, tough, flat, firm) | |
| unceasing(adjective, continue, firm, determined) | |
| continuing(adjective, continue, firm, certain) | |
| resolved(adjective, flat, firm, certain) | |
| unfailing(adjective, continue, firm, certain) | |
| unflinching(adjective, flat, firm, certain) | |
| unswerving(adjective, tough, firm, determined) | |
| inflexible(adjective, tough, flat, firm) | |
| loyal(adjective, firm, certain, moral) | |
| obdurate(adjective, tough, flat, firm) |
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| APA | Smart Define. (2015). persistent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/persistent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "persistent thesaurus" https://smartdefine.org/persistent/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, persistent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/persistent/thesaurus/synonyms>. |
| MLA | Smart Define. "persistent thesaurus" 1 June 2015. Web. 21 September 2026. <https://smartdefine.org/persistent/thesaurus/synonyms> |