98 entries under merciless topic. ×

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)
4
hateful(adjective, animal, mean, evil, sharp)
4
inflexible(adjective, harsh, cruel, determined, fierce)
4
nasty(adjective, mean, violent, wild, cruel)
4
stern(adjective, mean, harsh, cruel, vicious)
4
stony(adjective, mean, hard, tough, severe)
3
cutthroat(adjective, mean, hard, harsh, cold)
3
demoniac(adjective, evil, nasty, harsh, violent)
3
flinty(adjective, evil, nasty, harsh, vicious)
3
inexorable(adjective, mean, hard, tough, evil)
3
rancorous(adjective, mean, evil, nasty, harsh)
3
sinful(adjective, evil, nasty, harsh, offensive)
3
unnatural(adjective, evil, nasty, harsh, terrible)
2
depraved(adjective, adverb, evil, nasty, low)
2
excruciating(adjective, evil, nasty, harsh, vicious)
2
hardhearted(adjective, mean, hard, harsh, cold)
2
rigid(adjective, harsh, cruel, determined, fierce)
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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>