18
sinister(adjective, person, mean, bad, wrong)
17
pitiless(adjective, animal, mean, hard, tough)
17
vindictive(adjective, person, mean, severe, evil)
15
inhuman(adjective, animal, mean, bad, hard)
15
aloof(adjective, person, mean, hard, cool)
15
cold-blooded(adjective, person, mean, bad, hard)
15
uncaring(adjective, person, mean, bad, hard)
14
callous(adjective, mean, bad, hard, cool)
14
grim(adjective, animal, person, mean, hard)
14
hostile(adjective, person, mean, bad, tough)
14
stern(adjective, person, hard, tough, severe)
13
barbarous(adjective, animal, mean, hard, evil)
12
severe(adjective, hard, tough, harsh, cruel)
12
cool(adjective, person, mean, hard, unpleasant)
12
frigid(adjective, person, mean, hard, cool)
12
unkindly(adjective, bad, evil, cold, negative)
11
ruthless(adjective, animal, mean, hard, tough)
11
hardhearted(adjective, person, hard, cold, indifferent)
11
uncompassionate(adjective, animal, mean, hard, cool)
10
antagonistic(adjective, person, mean, bad, tough)
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APASmart Define. (2016). unkind thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/unkind/thesaurus/synonyms
ChicagoSmart Define. 2016. "unkind thesaurus" https://smartdefine.org/unkind/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, unkind thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unkind/thesaurus/synonyms>.
MLASmart Define. "unkind thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/unkind/thesaurus/synonyms>