Synonyms|248Antonyms|89|Broader|5Narrower|0Related|187

64 entries under heartless topic. ×

2
mortal(adjective, mean, severe, harsh, cruel)
2
rancorous(adjective, mean, harsh, cruel, vicious)
2
sadistic(adjective, mean, harsh, cruel, vicious)
2
uncompromising(adjective, cruel, pitiless, hardhearted)
2
vindictive(adjective, mean, hard, tough, severe)
1
adamant(adjective, mean, harsh, cruel, vicious)
1
gratuitous(adjective, mean, severe, harsh, cruel)
1
grim(adjective, mean, hard, tough, severe)
1
hatchet job(expression, adjective, mean, severe, harsh)
1
having a killer instinct(expression, adjective, idiom, mean, severe)
1
iron-fisted(adjective, mean, severe, harsh, cruel)
1
ironfisted(adjective, mean, harsh, cruel, vicious)
1
killer(adjective, mean, harsh, cruel, vicious)
1
malevolent(adjective, mean, harsh, cruel, vicious)
1
mean machine(expression, adjective, mean, severe, harsh)
1
revengeful(adjective, mean, harsh, cruel, vicious)
1
surly(adjective, mean, harsh, cruel, vicious)
1
unappeasable(adjective, mean, severe, harsh, cruel)
1
uncalled-for(adjective, mean, severe, harsh, cruel)
1
unflinching(adjective, mean, severe, harsh, cruel)
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APASmart Define. (2016). unmerciful thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unmerciful/thesaurus/synonyms
ChicagoSmart Define. 2016. "unmerciful thesaurus" https://smartdefine.org/unmerciful/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, unmerciful thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unmerciful/thesaurus/synonyms>.
MLASmart Define. "unmerciful thesaurus" 31 March 2016. Web. 29 September 2026. <https://smartdefine.org/unmerciful/thesaurus/synonyms>