doubly
tweely
in two ways
twofoldly
mixed
dually
dualistically
duodenally
duopolistically
bothridial
double-handed
irreparably
betweenity
feed two birds with one scone
double-barreled
relation
double-barrelled
otherwise
contrariwise
distinctly
differently
ambidirectional
biadjoint
importantly
interterm
bistrategic
submentalize
wear two hats
ana-
vagrate
divergently
miscibility
differingly
intransitively
twosome
bisemous
two-edged
six and two threes
coupla
interwork
two sides of the same coin
'tween
between
bivious
multiply
obverse
interordination
antarafacially
interrelationship
double