- Definitions|2
- Thesaurus|493
- Abbreviations|0
100 entries under strong topic. ×
| tireless(adjective, continue, firm, difficult) | |
| unflagging(adjective, tough, continue, fit) | |
| persistent(adjective, firm, determined, steady) | |
| untiring(adjective, continue, lively, determined) | |
| persevering(adjective, firm, difficult, determined) | |
| dogged(adjective, firm, determined, steady) | |
| determined(adjective, firm, steady, resolute) | |
| unfaltering(adjective, firm, determined, steady) | |
| unwavering(adjective, set, firm, determined) | |
| resolute(adjective, set, firm, determined) | |
| tenacious(adjective, tough, fit, firm) | |
| unfailing(adjective, set, continue, firm) | |
| inexhaustible(adjective, continue, firm, energetic) | |
| unwearied(adjective, activity, continue, firm) | |
| industrious(adjective, activity, difficult, energetic) | |
| staunch(adjective, tough, fit, firm) | |
| steady(adjective, firm, determined, resolute) | |
| vigorous(adjective, sound, tough, fit) | |
| unswerving(adjective, set, firm, determined) | |
| constant(adjective, firm, determined, steady) |
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| APA | Smart Define. (2015). indefatigable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/indefatigable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indefatigable thesaurus" https://smartdefine.org/indefatigable/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, indefatigable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/indefatigable/thesaurus/synonyms>. |
| MLA | Smart Define. "indefatigable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/indefatigable/thesaurus/synonyms> |