- Definitions|2
- Thesaurus|493
- Abbreviations|0
100 entries under strong topic. ×
| indomitable(adjective, firm, determined, steady) | |
| pertinacious(adjective, firm, determined, steady) | |
| firm(adjective, tough, fit, solid) | |
| patient(noun, adjective, firm, determined) | |
| unflinching(adjective, set, firm, determined) | |
| unremitting(adjective, firm, determined, steady) | |
| strenuous(adjective, moving, difficult, energetic) | |
| devoted(adjective, firm, determined, steady) | |
| enduring(adjective, set, fit, healthy) | |
| stalwart(adjective, sound, tough, fit) | |
| active(adjective, moving, difficult, energetic) | |
| dedicated(adjective, firm, determined, steady) | |
| dynamic(adjective, moving, lively, active) | |
| unceasing(adjective, firm, determined, steady) | |
| continuing(adjective, firm, determined, steady) | |
| spirited(adjective, moving, lively, active) | |
| enterprising(adjective, moving, lively, active) | |
| hearty(adjective, fit, healthy, well) | |
| lively(adjective, moving, active, vigorous) | |
| plodding(adjective, activity, firm, determined) |
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| APA | Smart Define. (2015). indefatigable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/indefatigable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indefatigable thesaurus" https://smartdefine.org/indefatigable/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, indefatigable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/indefatigable/thesaurus/synonyms>. |
| MLA | Smart Define. "indefatigable thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/indefatigable/thesaurus/synonyms> |