5
raucous(adjective, hard, severe, sharp, rough)
5
salty(adjective, strong, sharp, powerful, hot)
5
severe(adjective, hard, sharp, flat, rough)
5
sourish(adjective, bitter, altered, acid, tart)
5
spicy(adjective, pungent, tasty)
5
strident(adjective, hard, severe, sharp, rough)
5
strong(adjective, sharp, powerful, rank, corrupt)
5
tainted
5
unharmonious
5
work(verb, provoke, agitate, inflame, fester)
4
acetic(adjective, bitter, acid, tart, astringent)
4
acidulent
4
bearish(adjective, difficult, irritable, critical, crabby)
4
curdled(adjective, dull, rank, disagreeable, bitter)
4
curmudgeonly
4
curt
4
depressed(adjective, low, feelings, gloomy, miserable)
4
displeasing(adjective, quiet, bad, nasty, offensive)
4
down in the dumps(expression, adjective, feelings, gloomy, depressed)
4
fermented(adjective, bitter, acid, tart, astringent)
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APASmart Define. (2016). sour thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sour/thesaurus/synonyms
ChicagoSmart Define. 2016. "sour thesaurus" https://smartdefine.org/sour/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, sour thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sour/thesaurus/synonyms>.
MLASmart Define. "sour thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/sour/thesaurus/synonyms>