98 entries under merciless topic. ×

16
severe(adjective, person, mean, hard, tough)
15
atrocious(adjective, evil, nasty, harsh, offensive)
14
bloodthirsty(adjective, evil, nasty, harsh, violent)
13
cold(adjective, mean, hard, tough, severe)
13
hard-hearted(adjective, mean, bad, hard, tough)
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
hellish(adjective, evil, nasty, harsh, violent)
7
evil(adjective, nasty, harsh, awful, violent)
7
implacable(adjective, animal, mean, hard, tough)
7
malicious(adjective, animal, mean, evil, nasty)
7
tyrannical(adjective, hard, tough, evil, nasty)
7
unrelenting(adjective, animal, mean, hard, tough)
6
mean(adjective, animal, hard, sharp, nasty)
6
unbending(adjective, harsh, cruel, determined, fierce)
6
wicked(adjective, evil, nasty, harsh, offensive)
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APASmart Define. (2016). inhuman thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/inhuman/thesaurus/synonyms
ChicagoSmart Define. 2016. "inhuman thesaurus" https://smartdefine.org/inhuman/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, inhuman thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/inhuman/thesaurus/synonyms>.
MLASmart Define. "inhuman thesaurus" 24 March 2016. Web. 30 September 2026. <https://smartdefine.org/inhuman/thesaurus/synonyms>