192 entries under hard topic. ×
| bitter(adjective, upset, mean, bad, strong) | |
| harsh(adjective, tough, severe, taste) | |
| sharp(adjective, strong, severe, rough) | |
| acrid(adjective, strong, tough, severe) | |
| cantankerous(adjective, evil, rough, nasty) | |
| churlish(adjective, rough, nasty, low) | |
| ill-tempered(adjective, evil, rough, nasty) | |
| bad-tempered(adjective, evil, rough, nasty) | |
| unpleasant(adjective, bad, severe, evil) | |
| disagreeable(adjective, bad, evil, rough) | |
| rotten(adjective, bad, evil, rough) | |
| dry(adjective, taste, sharp, flat) | |
| stale(adjective, rank, corrupt, foul) | |
| grim(adjective, appearance, tough, severe) | |
| hostile(adjective, mean, severe, evil) | |
| nasty(adjective, mean, bad, severe) | |
| off-key(adjective, right, severe, sharp) | |
| astringent(adjective, severe, sharp, rough) | |
| down(adjective, evil, rough, nasty) | |
| querulous(adjective, difficult, critical, crabby) |
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| APA | Smart Define. (2016). sour thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sour/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sour thesaurus" https://smartdefine.org/sour/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, sour thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sour/thesaurus/synonyms>. |
| MLA | Smart Define. "sour thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/sour/thesaurus/synonyms> |