- Definitions|1
- Thesaurus|618
- Abbreviations|0
174 entries under adjective topic. ×
| hearty(strong, fit, healthy, well) | |
| immovable | |
| incessant(strong, firm, determined, steady) | |
| intrepid | |
| invincible | |
| kinetic(strong, moving, energetic, lively) | |
| lively(strong, moving, active, vigorous) | |
| plodding(strong, firm, determined, steady) | |
| plucky | |
| plugging(strong, firm, determined, active) | |
| rigid | |
| rugged(strong, sound, tough, fit) | |
| set | |
| spirited(strong, moving, lively, active) | |
| strenuous(strong, difficult, energetic, lively) | |
| strong-willed | |
| tough(strong, sound, fit, firm) | |
| trusty(trustworthy, faithful) | |
| unchangeable | |
| unconquerable |
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| APA | Smart Define. (2015). unflagging thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unflagging/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unflagging thesaurus" https://smartdefine.org/unflagging/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, unflagging thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unflagging/thesaurus/synonyms>. |
| MLA | Smart Define. "unflagging thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unflagging/thesaurus/synonyms> |