- Definitions|2
- Thesaurus|493
- Abbreviations|0
255 entries under adjective topic. ×
| powerful(strong, sound, tough, fit) | |
| purposive | |
| pushy | |
| recurrent | |
| red-blooded(strong, moving, lively, active) | |
| regular | |
| reliable | |
| remorseless | |
| repetitive | |
| rigid | |
| robot-like | |
| rugged(strong, sound, tough, fit) | |
| scrupulous | |
| seamless | |
| sequential | |
| serious | |
| snappy(strong, tough, fit, lively) | |
| spry(strong, moving, lively, active) | |
| steely | |
| stern |
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| APA | Smart Define. (2015). indefatigable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/indefatigable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indefatigable thesaurus" https://smartdefine.org/indefatigable/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, indefatigable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/indefatigable/thesaurus/synonyms>. |
| MLA | Smart Define. "indefatigable thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/indefatigable/thesaurus/synonyms> |