- Definitions|2
- Thesaurus|493
- Abbreviations|0
255 entries under adjective topic. ×
| industrious(activity, strong, difficult, energetic) | |
| staunch(strong, tough, fit, firm) | |
| steady(strong, firm, determined, resolute) | |
| vigorous(strong, sound, tough, fit) | |
| loyal | |
| stubborn(resolute, tenacious) | |
| unswerving(set, strong, firm, determined) | |
| constant(strong, firm, determined, steady) | |
| indomitable(strong, firm, determined, steady) | |
| pertinacious(strong, firm, determined, steady) | |
| firm(strong, tough, fit, solid) | |
| patient(noun, strong, firm, determined) | |
| relentless(resolute, untiring) | |
| resolved | |
| unflinching(set, strong, firm, determined) | |
| unremitting(strong, firm, determined, steady) | |
| painstaking(activity, untiring) | |
| strenuous(strong, moving, difficult, energetic) | |
| weariless(continue, tired, tireless) | |
| bold(resolute, tenacious) |
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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> |