10
harsh(adjective, mean, cool)
10
obnoxious
9
uncongenial(adjective, mean, cool, incompatible)
8
disagreeable(adjective, mean, cool)
7
incompatible(adjective, mean, cool)
7
not good
7
hostile
6
abhorrent
6
hateful(adjective, mean, cool)
5
unfriendly(adjective, mean, cool)
5
displeasing
4
offensive
4
unpleasant(adjective, mean, cool)
4
unsympathetic(adjective, mean, cool)
3
antagonistic
3
discordant(adjective, mean, cool)
3
disgusting
3
distasteful
3
horrible
3
horrid
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APASmart Define. (2016). congenial thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/congenial/thesaurus/antonyms
ChicagoSmart Define. 2016. "congenial thesaurus" https://smartdefine.org/congenial/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, congenial thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/congenial/thesaurus/antonyms>.
MLASmart Define. "congenial thesaurus" 23 March 2016. Web. 23 September 2026. <https://smartdefine.org/congenial/thesaurus/antonyms>