140 entries under hard topic. ×

11
ruthless(adjective, animal, appearance, mean)
11
sour(adjective, appearance, tough, severe)
9
fierce(adjective, animal, appearance, mean)
9
inhuman(adjective, animal, mean, tough)
9
vindictive(adjective, person, mean, tough)
8
inhumane(adjective, animal, person, mean)
8
pitiless(adjective, animal, mean, tough)
8
savage(adjective, animal, mean, tough)
8
unkind(adjective, animal, person, mean)
7
frowning(adjective, dull, strong, tough)
7
strict(adjective, strong, tough, severe)
7
tough(adjective, strong, severe, firm)
6
astringent(adjective, strong, tough, severe)
6
barbarous(adjective, animal, appearance, mean)
6
firm(adjective, strong, tough, severe)
6
immovable(adjective, strong, tough, determined)
6
rigorous(adjective, strong, tough, severe)
6
stiff-necked(adjective, strong, tough, severe)
6
unpleasant(adjective, mean, tough, severe)
5
bitter(adjective, strong, tough, severe)
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APASmart Define. (2016). grim thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/grim/thesaurus/synonyms
ChicagoSmart Define. 2016. "grim thesaurus" https://smartdefine.org/grim/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, grim thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/grim/thesaurus/synonyms>.
MLASmart Define. "grim thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/grim/thesaurus/synonyms>