192 entries under hard topic. ×

2
ugly(adjective, evil, rough, nasty)
2
uneven(adjective, severe, sharp, flat)
2
unmelodious(adjective, severe, sharp, flat)
2
unrelenting(adjective, tough, severe, sharp)
2
vile(adjective, bad, evil, rough)
1
avaricious(adjective, tough, harsh, cruel)
1
barbarous(adjective, tough, harsh, grim)
1
bloody(adjective, tough, harsh, cruel)
1
callous(adjective, tough, evil, rough)
1
caterwauling(adjective, severe, sharp, flat)
1
contemptible(adjective, bad, evil, rough)
1
craggy(adjective, severe, sharp, flat)
1
creaking(adjective, severe, sharp, flat)
1
croaking(adjective, severe, sharp, flat)
1
dangerous(adjective, evil, rough, nasty)
1
despicable(adjective, bad, evil, rough)
1
difficult(adjective, tough, evil, rough)
1
dirty(adjective, bad, rough, nasty)
1
disagreeing(adjective, severe, sharp, flat)
1
dishonorable(adjective, evil, rough, nasty)
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APASmart Define. (2016). sour thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sour/thesaurus/synonyms
ChicagoSmart Define. 2016. "sour thesaurus" https://smartdefine.org/sour/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, sour thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sour/thesaurus/synonyms>.
MLASmart Define. "sour thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/sour/thesaurus/synonyms>