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