192 entries under hard topic. ×

7
rank(adjective, nasty, unpleasant, corrupt)
7
rough(adjective, bad, severe, sharp)
7
spoiled(adjective, corrupt, disgusting, old)
7
unfriendly(adjective, mean, evil, rough)
6
coarse(adjective, severe, sharp, flat)
6
dissonant(adjective, severe, sharp, flat)
6
forbidding(adjective, tough, severe, harsh)
6
grating(adjective, severe, sharp, rough)
6
musty(adjective, rank, foul, disagreeable)
5
cacophonous(adjective, severe, sharp, rough)
5
discordant(adjective, severe, sharp, flat)
5
fetid(adjective, rank, corrupt, foul)
5
flat(adjective, severe, sharp, rough)
5
raucous(adjective, severe, sharp, rough)
5
severe(adjective, sharp, flat, rough)
5
strident(adjective, severe, sharp, rough)
3
clashing(adjective, severe, sharp, flat)
3
decayed(adjective, corrupt, disgusting, old)
3
fusty(adjective, rank, foul, disagreeable)
3
malodorous(adjective, rank, disagreeable, old)
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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>