187 entries under adjective topic. ×

5
cold(mean, harsh, cruel, vicious)
5
cold-hearted(negative, malevolence)
5
insensitive(hard, tough, harsh, cruel)
5
mean(severe, harsh, cruel, vicious)
5
severe(mean, harsh, cruel, vicious)
4
demoniac
4
obdurate(mean, hard, tough, harsh)
4
stonyhearted
4
unsympathizing(mean, unkind, coldhearted)
3
bestial(severe, harsh, cruel)
3
coldhearted(severe, harsh, cruel)
3
incompatible
3
stony(mean, harsh, cruel, vicious)
3
stony-hearted
3
tough(hard, harsh, cruel, grim)
3
uncaring(mean, severe, harsh, cruel)
3
uncongenial
3
unresponsive
2
compassionless(mean, hard, severe, harsh)
2
feral(mean, harsh, violent, cruel)
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APASmart Define. (2016). unmerciful thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unmerciful/thesaurus/synonyms
ChicagoSmart Define. 2016. "unmerciful thesaurus" https://smartdefine.org/unmerciful/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, unmerciful thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unmerciful/thesaurus/synonyms>.
MLASmart Define. "unmerciful thesaurus" 31 March 2016. Web. 27 September 2026. <https://smartdefine.org/unmerciful/thesaurus/synonyms>