99 entries under hard topic. ×

15
vicious(adjective, mean, evil, rough)
14
cold-blooded(adjective, person, mean, tough)
14
ferocious(adjective, mean, evil, rough)
14
fierce(adjective, mean, tough, evil)
14
severe(adjective, appearance, mean, tough)
13
implacable(adjective, appearance, mean, tough)
13
relentless(adjective, appearance, mean, tough)
12
brutish(adjective, evil, nasty, harsh)
12
inexorable(adjective, appearance, mean, tough)
12
unyielding(adjective, appearance, mean, tough)
11
grim(adjective, appearance, mean, tough)
11
insensitive(adjective, tough, severe, harsh)
11
vindictive(adjective, person, mean, tough)
10
hardhearted(adjective, mean, cold, cruel)
10
obdurate(adjective, person, mean, tough)
10
stern(adjective, person, appearance, mean)
10
tough(adjective, severe, rough, harsh)
9
dog-eat-dog(adjective, mean, harsh, cruel)
9
uncompromising(adjective, rough, harsh, cruel)
8
cold(adjective, mean, tough, severe)
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APASmart Define. (2016). merciless thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/merciless/thesaurus/synonyms
ChicagoSmart Define. 2016. "merciless thesaurus" https://smartdefine.org/merciless/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, merciless thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/merciless/thesaurus/synonyms>.
MLASmart Define. "merciless thesaurus" 31 March 2016. Web. 29 September 2026. <https://smartdefine.org/merciless/thesaurus/synonyms>