have a foot in both camps
bilateral
across
counterside
cross-handed
opposing
overside
bidirectionally
bilaterally
two-sided
reverse
sideways
controlateral
contralaterality
wear two hats
sideward
counterviewpoint
counterpoint
counterview
diametric
sidewards
frontofrontal
box and cox
bipartible
straddle
above
interoptode
cross
round about
ambidirectional
alternative
mixed
spread out
aside
counter
apart
retro-
interden
face
sidelessness
otherwise
both-handed
diverge
Antarctic
doubly
comonad
bifronted
on the horns of a dilemma
sideling
opposably
hetero-
counterideal
dichotomize
contrary
co-
coalternate
opposite
adverse
diametrical
polar
jump
divergently
between the devil and the deep blue sea
about turn
in between
antiextreme
opposable
counterestablishment
en face
third way
betweenity
counterobject
pit
antipolar
half
separately
space
pit against
opposingly
interdictively
every stick has two ends
vis-à-vis
better
diviningly
intervolve
otherly