hostile
adversary
adversative
adverse
adversive
aggressive
alien
antagonistic
anti
antipathetic
antithetic
antonymous
at cross-purposes
balancing
battling
bellicose
belligerent
bloodthirsty
bloody
bloody-minded
breakaway
chauvinist
chauvinistic
chill
chilly
clashing
cold
combative
compensating
competitive
con
conflicting
confronting
contentious
contradicting
contradictory
contradistinct
contrapositive
contrarious
contrary
contrasted
converse
cool
counter
counteractant
counteracting
counteractive
counterbalancing
counterpoised
inimically
abhorrent
averse
detrimental
dissatisfied
disturb
harmful
liable
malevolent
problematic
repugnant
subjective
uncongenial
unfavorable
unfitted
unfriendly
unpopular
unsafe
unsympathetic