74 entries under tough topic. ×

11
hard(adjective, mean, severe, evil)
9
grim(adjective, animal, mean, hard)
9
relentless(adjective, animal, mean, hard)
8
uncompassionate(adjective, animal, hard, severe)
7
implacable(adjective, animal, mean, hard)
7
insensate(adjective, bad, hard, severe)
7
insensible(adjective, bad, hard, severe)
7
tyrannical(adjective, hard, evil, nasty)
7
unrelenting(adjective, animal, mean, hard)
6
sanguinary(adjective, hard, harsh, violent)
6
uncaring(adjective, person, mean, bad, hard)
5
bloody(adjective, hard, harsh, violent)
5
obdurate(adjective, mean, hard, severe)
5
unforgiving(adjective, person, mean, hard)
5
unmerciful(adjective, mean, hard, harsh)
4
stony(adjective, mean, hard, severe)
3
apathetic(adjective, hard, severe, temper)
3
icy(adjective, hard, severe, temper)
3
inexorable(adjective, mean, hard, evil)
3
iron-hearted(adjective, bad, hard, severe)
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APASmart Define. (2016). inhuman thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/inhuman/thesaurus/synonyms
ChicagoSmart Define. 2016. "inhuman thesaurus" https://smartdefine.org/inhuman/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, inhuman thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/inhuman/thesaurus/synonyms>.
MLASmart Define. "inhuman thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/inhuman/thesaurus/synonyms>