87 entries under severe topic. ×

1
crotchety(adjective, hard, tough, cruel)
1
cutthroat(adjective, mean, hard, harsh)
1
deadened(adjective, hard, tough, cruel)
1
exacting(adjective, hard, tough, cruel)
1
feelingless(adjective, hard, tough, indifferent)
1
hatchet job(expression, adjective, mean, harsh)
1
having a killer instinct(expression, adjective, idiom, mean)
1
inanimate(adjective, hard, tough, cruel)
1
iron-fisted(adjective, mean, harsh, cruel)
1
iron-hearted(adjective, hard, tough, cruel)
1
mean machine(expression, adjective, mean, harsh)
1
mortal(adjective, mean, harsh, cruel)
1
sensationless(adjective, hard, tough, cruel)
1
senseless(adjective, hard, tough, cruel)
1
surly(adjective, mean, hard, tough)
1
unamiable(adjective, hard, tough, cruel)
1
unappeasable(adjective, mean, harsh, cruel)
1
uncordial(adjective, hard, tough, cruel)
1
unflinching(adjective, mean, harsh, cruel)
0
dog eat dog(expression, idiom, mean)
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APASmart Define. (2016). heartless thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/heartless/thesaurus/synonyms
ChicagoSmart Define. 2016. "heartless thesaurus" https://smartdefine.org/heartless/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, heartless thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/heartless/thesaurus/synonyms>.
MLASmart Define. "heartless thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/heartless/thesaurus/synonyms>