86 entries under harsh topic. ×

2
amaroidal(adjective, sharp, pungent, acid)
2
blunt(adjective, tough, awkward, grumpy)
2
unrelenting(adjective, hard, tough, severe, sharp)
1
avaricious(adjective, hard, tough, cruel)
1
awkward(tough, irritable, grumpy, bad-tempered)
1
barbarous(adjective, hard, tough, grim)
1
bloody(adjective, hard, tough, cruel)
1
callous(adjective, hard, tough, evil, rough)
1
captious(adjective, tough, difficult, awkward)
1
difficult(adjective, hard, tough, evil, rough)
1
fierce(adjective, bad, hard, tough, severe)
1
hard-bitten(adjective, hard, tough, cruel)
1
hard-hearted(adjective, hard, tough, cruel)
1
hardened(adjective, hard, tough, cruel)
1
impenitent(adjective, hard, tough, cruel)
1
implacable(adjective, hard, tough, grim)
1
inexorable(adjective, hard, tough, grim)
1
inhuman(adjective, hard, tough, cruel)
1
inhumane(adjective, hard, tough, cruel)
1
insensitive(adjective, hard, tough, cruel)
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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>