adversative
adverse
adversive
antagonistic
anti
antipathetic
antipodal
antithetic
antonymous
at cross-purposes
balancing
clashing
compensating
conflicting
contradictory
contradistinct
contrapositive
contrarious
contrary
contrasted
converse
counter
counterbalancing
counterpoised
countervailing
dead against
discordant
discrepant
eyeball to eyeball
eyeball-to-eyeball
facing
hostile
inconsistent
inimical
inverse
obverse
opposed
opposing
opposite
oppositional
oppositive
oppugnant
perverse
polar
polaric
polarized
repugnant
reverse
squared off
affronting
blunting
bunting
fronting
grunting
hunting
shunting