63 entries under unkind topic. ×

14
fierce(adjective, mean, hard, tough, evil)
13
implacable(adjective, appearance, mean, hard, tough)
13
relentless(adjective, appearance, mean, hard, tough)
12
brutish(adjective, hard, evil, nasty, harsh)
12
inexorable(adjective, appearance, mean, hard, tough)
12
mean(adjective, person, evil, nasty, difficult)
11
bloodthirsty(adjective, severe, evil, nasty, harsh)
11
vindictive(adjective, person, mean, hard, tough)
10
malevolent(adjective, mean, evil, nasty, harsh)
10
spiteful(adjective, person, mean, evil, nasty)
7
malicious(adjective, mean, evil, nasty, harsh)
7
tyrannical(adjective, hard, tough, evil, nasty)
7
uncharitable(adjective, mean, ungenerous)
6
atrocious(adjective, evil, nasty, harsh, violent)
6
bestial(adjective, severe, evil, nasty, harsh)
6
monstrous(adjective, severe, evil, nasty, harsh)
6
vengeful(adjective, mean, severe, evil, nasty)
5
demoniac(adjective, evil, nasty, harsh, violent)
5
flinty(adjective, evil, nasty, harsh, vicious)
5
hellish(adjective, evil, nasty, harsh, violent)
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APASmart Define. (2016). merciless thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/merciless/thesaurus/synonyms
ChicagoSmart Define. 2016. "merciless thesaurus" https://smartdefine.org/merciless/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, merciless thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/merciless/thesaurus/synonyms>.
MLASmart Define. "merciless thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/merciless/thesaurus/synonyms>