100 entries under severe topic. ×

7
rough(adjective, bad, hard, sharp)
6
coarse(adjective, hard, sharp, flat)
6
dissonant(adjective, hard, sharp, flat)
6
forbidding(adjective, hard, tough, harsh)
6
grating(adjective, hard, sharp, rough)
6
resentful(adjective, nasty, informal, cross)
6
stern(adjective, unfriendly, bleak, angry)
5
cacophonous(adjective, hard, sharp, rough)
5
discordant(adjective, hard, sharp, flat)
5
embittered(adjective, nasty, hostile, disagreeable)
5
flat(adjective, hard, sharp, rough)
5
raucous(adjective, hard, sharp, rough)
5
strident(adjective, hard, sharp, rough)
4
uncivil(adjective, bleak, angry, stark)
3
clashing(adjective, hard, sharp, flat)
3
dreary(adjective, unfriendly, stern, ironic)
3
hard(adjective, tough, evil, sharp)
3
rude(adjective, hard, rough, nasty)
3
unmusical(adjective, hard, sharp, flat)
3
virulent(adjective, mean, nasty, hostile)
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APASmart Define. (2016). sour thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/sour/thesaurus/synonyms
ChicagoSmart Define. 2016. "sour thesaurus" https://smartdefine.org/sour/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, sour thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/sour/thesaurus/synonyms>.
MLASmart Define. "sour thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/sour/thesaurus/synonyms>