Synonyms|561Antonyms|231|Broader|3Narrower|13Related|1.2k
1
coldhearted
1
compassionless
1
cutthroat
1
ferocious
1
fiendish
1
ungracious
1
unpitying
1
unrelenting(adjective, merciless)
1
vicious
0
grim
0
hard-hearted
0
implacable(adjective, cruel, merciless)
0
inclement(adjective, cruel, merciless)
0
inexorable(adjective, cruel, pitiless)
0
mortal
0
murderous
0
niggardly
0
relentless(adjective, cruel, merciless)
0
revengeful
0
rigorous
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APASmart Define. (2016). merciful thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/merciful/thesaurus/antonyms
ChicagoSmart Define. 2016. "merciful thesaurus" https://smartdefine.org/merciful/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, merciful thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/merciful/thesaurus/antonyms>.
MLASmart Define. "merciful thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/merciful/thesaurus/antonyms>