192 entries under hard topic. ×
| jagged(adjective, severe, sharp, flat) | |
| jangling(adjective, severe, sharp, flat) | |
| knavish(adjective, evil, rough, nasty) | |
| lousy(adjective, bad, evil, rough) | |
| low-down and dirty(expression, adjective, idiom, evil) | |
| malicious(adjective, mean, evil, rough) | |
| malign(adjective, evil, rough, nasty) | |
| merciless(adjective, tough, harsh, grim) | |
| murderous(adjective, tough, harsh, cruel) | |
| noisy(adjective, severe, sharp, rough) | |
| not smooth(expression, adjective, idiom, severe) | |
| old(adjective, musty, decayed, watery) | |
| out-of-key(adjective, severe, sharp, flat) | |
| out-of-tune(adjective, severe, sharp, flat) | |
| perfidious(adjective, evil, rough, nasty) | |
| pesky(adjective, evil, rough, nasty) | |
| pitiless(adjective, tough, severe, harsh) | |
| reeking(adjective, rank, foul, old) | |
| relentless(adjective, tough, severe, harsh) | |
| rigid(adjective, severe, sharp, flat) |
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| APA | Smart Define. (2016). sour thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/sour/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sour thesaurus" https://smartdefine.org/sour/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, sour thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/sour/thesaurus/synonyms>. |
| MLA | Smart Define. "sour thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/sour/thesaurus/synonyms> |