- Definitions|2
- Thesaurus|1.3k
- Abbreviations|0
602 entries under adjective topic. ×
| unsympathetic(animal, mean, hard, severe) | |
| bound(strong, tough, firm, cruel) | |
| demanding(severe, difficult, persistent, obstinate) | |
| diligent | |
| everlasting(continue, steady, persistent, constant) | |
| faithful(strong, firm, intense, determined) | |
| habitual(persistent, continuous, endless, continual) | |
| headstrong(strong, tough, cold, determined) | |
| interminable(continue, determined, steady, persistent) | |
| lasting(persistent, constant, continuous, endless) | |
| loyal(strong, firm, intense, determined) | |
| mortal(mean, severe, harsh, cruel) | |
| ongoing | |
| oppressive(severe, pure, absolute, severity) | |
| pat(determined, resolute, obstinate, uncompromising) | |
| regular(steady, persistent, constant, continuous) | |
| stony-hearted(cold, cruel, unfeeling, unsympathetic) | |
| strong-willed(determined, resolution, resolute, uncompromising) | |
| unending(continue, steady, persistent, constant) | |
| unfailing |
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| APA | Smart Define. (2015). relentless thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/relentless/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "relentless thesaurus" https://smartdefine.org/relentless/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, relentless thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/relentless/thesaurus/synonyms>. |
| MLA | Smart Define. "relentless thesaurus" 24 June 2015. Web. 25 September 2026. <https://smartdefine.org/relentless/thesaurus/synonyms> |