- Definitions|1
- Thesaurus|500
- Abbreviations|0
| hard-working | |
| heroic | |
| high-powered(adjective, strong, moving, energetic, lively) | |
| hyper(adjective, determined, persevering) | |
| immovable | |
| imperturbable(adjective, calm, quiet, gentle, restrained) | |
| inalterable | |
| indulgent(adjective, calm, quiet, understanding, gentle) | |
| inflexible | |
| intense | |
| intent | |
| interminable | |
| intrepid | |
| jumping(adjective, determined, persevering) | |
| kinetic(adjective, strong, moving, energetic, lively) | |
| lasting | |
| leatherlike | |
| leathery | |
| lenient(adjective, calm, quiet, understanding, gentle) | |
| long-suffering(adjective, calm, quiet, gentle, restrained) |
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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> |