192 entries under hard topic. ×
| rigorous(adjective, tough, harsh, cruel) | |
| rusty(adjective, severe, sharp, flat) | |
| ruthless(adjective, tough, severe, harsh) | |
| sanguinary(adjective, tough, harsh, cruel) | |
| savage(adjective, tough, harsh, cruel) | |
| screeching(adjective, severe, sharp, flat) | |
| scurrilous(adjective, bad, evil, rough) | |
| shameless(adjective, tough, evil, rough) | |
| sinking(adjective, evil, rough, nasty) | |
| snide(adjective, evil, rough, nasty) | |
| stridulous(adjective, severe, sharp, flat) | |
| touch(noun, adjective, evil, rough) | |
| tough(adjective, severe, nasty, harsh) | |
| treacherous(adjective, evil, rough, nasty) | |
| troublesome(adjective, bad, evil, rough) | |
| tyrannical(adjective, tough, harsh, cruel) | |
| uncontrite(adjective, tough, harsh, cruel) | |
| unforgiving(adjective, tough, harsh, cruel) | |
| unlevel(adjective, severe, sharp, flat) | |
| unmerciful(adjective, tough, harsh, cruel) |
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| APA | Smart Define. (2016). sour thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sour/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sour thesaurus" https://smartdefine.org/sour/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, sour thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sour/thesaurus/synonyms>. |
| MLA | Smart Define. "sour thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/sour/thesaurus/synonyms> |