- Definitions|2
- Thesaurus|1.3k
- Abbreviations|0
150 entries under hard topic. ×
| serious(adjective, close, strong, tough) | |
| barbarous(adjective, animal, appearance, mean, strong) | |
| cold-blooded(adjective, mean, evil, nasty) | |
| forbidding(adjective, appearance, strong, tough) | |
| hard-line(adjective, strong, tough, firm) | |
| indurate(adjective, mean, determined, resolute) | |
| mean(adjective, animal, severe, nasty) | |
| perverse(adjective, mean, tough, determined) | |
| tyrannical(adjective, tough, evil, nasty) | |
| uncompassionate(adjective, animal, mean, harsh) | |
| uncooperative(adjective, mean, persistent, obstinate) | |
| unregenerate(adjective, tough, harsh, cruel) | |
| vindictive(adjective, mean, tough, severe) | |
| astringent(adjective, close, strong, tough) | |
| authoritarian(adjective, strong, tough, severe) | |
| cold(adjective, close, mean, strong) | |
| cold-hearted(adjective, cold, cruel, unfeeling) | |
| dog-eat-dog(adjective, mean, severe, harsh) | |
| gruff(adjective, severe, sharp, nasty) | |
| hard-core(adjective, strong, tough, severe) |
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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> |