- Definitions|2
- Thesaurus|493
- Abbreviations|0
255 entries under adjective topic. ×
| tireless(strong, continue, firm, difficult) | |
| unflagging(strong, tough, continue, fit) | |
| persistent(strong, firm, determined, steady) | |
| untiring(strong, continue, lively, determined) | |
| persevering(strong, firm, difficult, determined) | |
| dogged(strong, firm, determined, steady) | |
| steadfast(resolute, persevering, tenacious, untiring) | |
| determined(strong, firm, steady, resolute) | |
| diligent(activity, resolute, persevering, tenacious) | |
| energetic(determined, active, full, forceful) | |
| unfaltering(strong, firm, determined, steady) | |
| unwavering(set, strong, firm, determined) | |
| resolute(set, strong, firm, determined) | |
| sedulous(activity, untiring) | |
| assiduous(activity, untiring) | |
| tenacious(strong, tough, fit, firm) | |
| unwearying | |
| unfailing(set, strong, continue, firm) | |
| inexhaustible(strong, continue, firm, energetic) | |
| unwearied(activity, strong, continue, firm) |
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| APA | Smart Define. (2015). indefatigable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/indefatigable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indefatigable thesaurus" https://smartdefine.org/indefatigable/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, indefatigable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/indefatigable/thesaurus/synonyms>. |
| MLA | Smart Define. "indefatigable thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/indefatigable/thesaurus/synonyms> |