- Definitions|1
- Thesaurus|618
- Abbreviations|0
49 entries under firm topic. ×
| indefatigable(adjective, strong, tough, continue, fit) | |
| tireless(adjective, strong, continue, difficult) | |
| untiring(adjective, strong, continue, solid) | |
| persistent(adjective, strong, certain, determined) | |
| unfaltering(adjective, strong, solid, energetic) | |
| unwavering(adjective, set, strong, solid) | |
| persevering(adjective, strong, difficult, energetic) | |
| unfailing(adjective, strong, continue, certain) | |
| dogged(adjective, strong, solid, energetic) | |
| resolute(adjective, strong, solid, determined) | |
| determined(adjective, strong, solid, steady) | |
| constant(adjective, strong, certain, determined) | |
| staunch(adjective, strong, tough, fit) | |
| steady(adjective, strong, complete, total) | |
| tenacious(adjective, strong, tough, fit) | |
| unswerving(adjective, set, strong, complete) | |
| unwearied(adjective, strong, continue, energetic) | |
| inexhaustible(adjective, strong, continue, energetic) | |
| unremitting(adjective, strong, energetic, determined) | |
| faithful(adjective, certain, cheerful, comfortable) |
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| APA | Smart Define. (2015). unflagging thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unflagging/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unflagging thesaurus" https://smartdefine.org/unflagging/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, unflagging thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unflagging/thesaurus/synonyms>. |
| MLA | Smart Define. "unflagging thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unflagging/thesaurus/synonyms> |