87 entries under heartless topic. ×

11
feral(adjective, adverb, mean, kind, rough)
11
hard(adjective, mean, tough, severe, evil)
11
sadistic(adjective, adverb, person, mean, evil)
10
remorseless(adjective, animal, mean, harsh, violent)
9
grim(adjective, animal, mean, hard, tough)
9
relentless(adjective, animal, mean, hard, tough)
8
uncompassionate(adjective, animal, hard, tough, severe)
7
implacable(adjective, animal, mean, hard, tough)
7
insensate(adjective, bad, hard, tough, severe)
7
insensible(adjective, bad, hard, tough, severe)
7
unrelenting(adjective, animal, mean, hard, tough)
6
mean(adjective, animal, hard, sharp, nasty)
6
stony-hearted(adjective, cold, cruel, unfeeling, unsympathetic)
6
tough(adjective, hard, severe, harsh, violent)
6
uncaring(adjective, person, mean, bad, hard)
5
hard-boiled(adjective, bad, hard, cold, cruel)
5
malevolent(adjective, mean, evil, nasty, harsh)
5
obdurate(adjective, mean, hard, tough, severe)
5
unforgiving(adjective, person, mean, hard, tough)
5
unmerciful(adjective, mean, hard, tough, harsh)
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APASmart Define. (2016). inhuman thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/inhuman/thesaurus/synonyms
ChicagoSmart Define. 2016. "inhuman thesaurus" https://smartdefine.org/inhuman/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, inhuman thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/inhuman/thesaurus/synonyms>.
MLASmart Define. "inhuman thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/inhuman/thesaurus/synonyms>