- Definitions|2
- Thesaurus|1.4k
- Abbreviations|0
493 entries under adjective topic. ×
| rigid(severe, harsh, cruel, determined) | |
| rigorous(hard, tough, harsh, unpleasant) | |
| satanic(mean, hard, harsh, cold) | |
| soulless(mean, hard, harsh, cold) | |
| spunky | |
| staunch | |
| steadfast | |
| strong-minded | |
| strong-willed | |
| surly(mean, hard, tough, severe) | |
| tenacious | |
| thick-skinned(hard, tough, severe, cruel) | |
| thorough | |
| tireless | |
| unchangeable | |
| uncharitable | |
| unmoved(cold, cruel, unfeeling, unsympathetic) | |
| unprincipled(honest, corrupt, vicious, dishonest) | |
| unshakeable | |
| valiant |
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| APA | Smart Define. (2016). ruthless thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/ruthless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "ruthless thesaurus" https://smartdefine.org/ruthless/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, ruthless thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/ruthless/thesaurus/synonyms>. |
| MLA | Smart Define. "ruthless thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/ruthless/thesaurus/synonyms> |