387 entries under adjective topic. ×

6
unyielding(mean, hard, severe, harsh)
5
anesthetized(hard, tough, severe, cruel)
5
barbaric(rude, violent, cruel, vicious)
5
ferocious(mean, evil, nasty, harsh)
5
grim(mean, severe, harsh, violent)
5
insensible(hard, cool, tough, severe)
5
nonchalant(cool, indifferent, detached, blank)
5
objective(indifferent, detached, distant, apathetic)
5
spiritless(hard, cool, careless, indifferent)
5
unnatural(evil, nasty, harsh, cruel)
4
fierce(mean, severe, evil, nasty)
4
passive
4
thoughtless(mean, ill, hostile, unfriendly)
4
unsparing(mean, severe, harsh, cruel)
4
unfriendly(person, mean, hard, feelings)
3
shameless(wicked, vice)
3
unloving(person, hard, feelings, cruel)
3
atrocious(bad, wrong, evil, nasty)
3
bloodthirsty(severe, evil, nasty, harsh)
3
blunt
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APASmart Define. (2016). heartless thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/heartless/thesaurus/synonyms
ChicagoSmart Define. 2016. "heartless thesaurus" https://smartdefine.org/heartless/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, heartless thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/heartless/thesaurus/synonyms>.
MLASmart Define. "heartless thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/heartless/thesaurus/synonyms>