280 entries under tough topic. ×
| immovable(adjective, mean, strong, cruel) | |
| implacable(adjective, mean, strong, severe) | |
| inconsiderate(adjective, person, mean, severe) | |
| inhuman(adjective, mean, severe, evil) | |
| intractable(adjective, sharp, firm, fixed) | |
| powerful(adjective, person, body, strong, great) | |
| stringent(adjective, severe, rough, firm) | |
| uncompassionate(adjective, mean, cool, severe) | |
| unmerciful(adjective, mean, severe, harsh) | |
| uphill(adjective, great, easy, severe) | |
| effortful(adjective, great, difficult, harsh) | |
| inhumane(adjective, person, mean, severe) | |
| unsentimental(adjective, sound, reasonable, sensible) | |
| close(adjective, adverb, strong, correct) | |
| determined(adjective, strong, severe, harsh) | |
| hard-boiled(adjective, mean, strong, sound) | |
| savage(adjective, mean, rough, harsh) | |
| thick(adjective, person, body, strong) | |
| thick-skinned(adjective, mean, severe, careless) | |
| ticklish(adjective, difficult, delicate, tricky) |
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| APA | Smart Define. (2016). hard thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hard/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, hard thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>. |
| MLA | Smart Define. "hard thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms> |