280 entries under tough topic. ×

2
ugly(adjective, severe, evil, rough)
2
uncivil(adjective, severe, sharp, nasty)
2
ungracious(adjective, mean, severe, sharp)
2
unjust(adjective, harsh, rude, cruel)
2
unregenerate(adjective, harsh, cruel, grim)
2
unrepenting(adjective, harsh, cruel, grim)
2
unshakable(adjective, mean, strong, harsh)
2
upsetting(adjective, severe, offensive, tricky)
1
Draconian(severe, firm, harsh, rigid)
1
asleep(adjective, severe, cruel, unsympathetic)
1
astute(sound, reasonable, sharp, sensible)
1
benumbed(adjective, severe, firm, solid)
1
bloody(adjective, rough, harsh, coarse)
1
bullhead(adjective, mean, harsh, stiff)
1
by the book(expression, adjective, idiom, strong)
1
churlish(adjective, severe, rough, nasty)
1
cold fish(expression, adjective, mean, severe)
1
congealed(adjective, set, firm, solid)
1
crass(adjective, mean, strong, harsh)
1
crotchety(adjective, severe, cruel, unsympathetic)
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APASmart Define. (2016). hard thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hard/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, hard thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>.
MLASmart Define. "hard thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms>