157 entries under severe topic. ×

16
uncompassionate(adjective, animal, mean, hard, tough)
15
bloodthirsty(adjective, evil, nasty, harsh)
15
implacable(adjective, animal, appearance, mean, hard)
15
inexorable(adjective, appearance, mean, hard, tough)
15
unforgiving(adjective, mean, hard, tough)
14
inhumane(adjective, animal, mean, hard, tough)
14
tough(adjective, strong, hard, rough)
14
unyielding(adjective, appearance, mean, strong, hard)
12
unkind(adjective, animal, mean, hard, tough)
11
grim(adjective, animal, appearance, mean, hard)
11
insensitive(adjective, hard, tough, harsh)
11
stern(adjective, appearance, mean, hard)
10
bestial(adjective, animal, mean, evil)
9
cold(adjective, mean, hard, tough)
9
cutthroat(adjective, mean, harsh, cruel)
9
dog-eat-dog(adjective, mean, harsh, cruel)
9
hardhearted(adjective, mean, harsh, cold)
9
obdurate(adjective, mean, hard, tough)
9
stony(adjective, mean, hard, tough)
8
mean(verb, adjective, animal, hard)
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APASmart Define. (2016). ruthless thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/ruthless/thesaurus/synonyms
ChicagoSmart Define. 2016. "ruthless thesaurus" https://smartdefine.org/ruthless/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, ruthless thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/ruthless/thesaurus/synonyms>.
MLASmart Define. "ruthless thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/ruthless/thesaurus/synonyms>