- Definitions|2
- Thesaurus|860
- Abbreviations|0
| peppy(adjective, strong, moving, energetic, lively) | |
| plodding(adjective, strong, firm, determined, steady) | |
| plugging(adjective, strong, keen, firm, lively) | |
| ruthless(adjective, resolute) | |
| spunky(adjective, resolute, tenacious) | |
| stable | |
| stiff(adjective, tenacious) | |
| stirring(adjective, active) | |
| strong-willed(adjective, resolute, tenacious) | |
| unbending(adjective, resolute) | |
| unchangeable(adjective, resolute) | |
| uncompromising(adjective, resolute) | |
| unconquerable | |
| unshakable | |
| unstoppable | |
| ambitious | |
| ardent | |
| ball of fire(expression, adjective, idiom, strong, energetic) | |
| bound | |
| bound and determined |
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| APA | Smart Define. (2016). tireless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/tireless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "tireless thesaurus" https://smartdefine.org/tireless/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, tireless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/tireless/thesaurus/synonyms>. |
| MLA | Smart Define. "tireless thesaurus" 19 February 2016. Web. 24 September 2026. <https://smartdefine.org/tireless/thesaurus/synonyms> |