- Definitions|1
- Thesaurus|618
- Abbreviations|0
| hard-working | |
| hearty(adjective, strong, fit, healthy, well) | |
| immovable | |
| incessant(adjective, strong, firm, determined, steady) | |
| incurable | |
| intent | |
| intrepid | |
| invincible | |
| kinetic(adjective, strong, moving, energetic, lively) | |
| lively(adjective, strong, moving, active, vigorous) | |
| permanent | |
| plodding(adjective, strong, firm, determined, steady) | |
| plucky(adjective, tenacious) | |
| plugging(adjective, strong, firm, determined, active) | |
| rigid | |
| rugged(adjective, strong, sound, tough, fit) | |
| set | |
| spirited(adjective, strong, moving, lively, active) | |
| strenuous(adjective, strong, difficult, energetic, lively) | |
| strong-willed(adjective, tenacious) |
For more, visit
Unflagging on
Power Thesaurus
| APA | Smart Define. (2015). unflagging thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unflagging/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unflagging thesaurus" https://smartdefine.org/unflagging/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, unflagging thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unflagging/thesaurus/synonyms>. |
| MLA | Smart Define. "unflagging thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/unflagging/thesaurus/synonyms> |