367 entries under hard topic. ×
| inexorable(adjective, mean, strong, firm) | |
| set(verb, adjective, calm, strong) | |
| tyrannical(adjective, harsh, cruel, grim) | |
| uncompassionate(adjective, mean, cool, severe) | |
| authoritarian(noun, adjective, strong, severe) | |
| cold-blooded(adjective, calm, mean, cool) | |
| critical(adjective, difficult, harsh, important) | |
| grim(adjective, strong, severe, firm) | |
| headstrong(adjective, rough, firm, difficult) | |
| implacable(adjective, mean, strong, firm) | |
| inhuman(adjective, severe, harsh, violent) | |
| inured(noun, adjective, strong, sound) | |
| unemotional(adjective, calm, mean, cool) | |
| apathetic(adjective, mean, cool, severe) | |
| bullheaded(adjective, strong, firm, difficult) | |
| dogged(adjective, mean, strong, firm) | |
| grueling(adjective, difficult, problematic, trying) | |
| hairy(adjective, severe, sharp, rough) | |
| hardhearted(adjective, severe, careless, indifferent) | |
| icy(adjective, mean, cool, severe) |
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| APA | Smart Define. (2016). tough thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/tough/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, tough thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>. |
| MLA | Smart Define. "tough thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms> |