- Definitions|1
- Thesaurus|500
- Abbreviations|0
| resigned(adjective, calm, quiet, gentle, restrained) | |
| resistant | |
| ropy | |
| rugged(adjective, strong, moving, lively, active) | |
| self-possessed(adjective, calm, quiet, gentle, restrained) | |
| serene(adjective, calm, quiet, gentle, restrained) | |
| set | |
| sinewy | |
| sleepless | |
| slogging | |
| snappy(adjective, strong, moving, energetic, lively) | |
| sprightly(adjective, strong, moving, energetic, lively) | |
| spry(adjective, strong, moving, energetic, lively) | |
| stable | |
| stiff | |
| stoical(adjective, calm, quiet, understanding, gentle) | |
| strenuous(adjective, strong, moving, energetic, lively) | |
| stringy | |
| submissive(adjective, calm, quiet, understanding, gentle) | |
| thorough |
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| APA | Smart Define. (2015). untiring thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/untiring/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "untiring thesaurus" https://smartdefine.org/untiring/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, untiring thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/untiring/thesaurus/synonyms>. |
| MLA | Smart Define. "untiring thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/untiring/thesaurus/synonyms> |