bothridial
mixed
relation
double
betweenity
distinguishment
bisemous
beidellitic
interterm
interrelationship
doubly
alteriority
wherebetween
miscibility
differential
interreference
ambidirectional
accommodation
intertegular
vagrate
two-edged
interdistinguish
variation
differing
dif
pushmi-pullyu
intereffect
chiastic
two sides of the same coin
comparate
double-handedness
dualistic
contrariwise
intercept
six and two threes
crosslinkage
ana-
amphi-
double-barrelled
double-barreled
wear two hats
beta
ambi-
twinstick
latter
interden
duodenal
in between
obverse
prominence