two-sided
bilateral
bilaterally
shoulder-to-shoulder
orthotomous
antitropic
squinty
sideway
twinstick
dicephalous
bifronted
adjacent angle
interosculant
biangular
interoptode
biconvex
semilateral
periduodenal
elbow to elbow
collaterally
antiparallelogram
interrelated
birectangular
interconnected
multisided
alongside
cross-handed
biconcave
auriculate
have a foot in both camps
orthogonal
sideling
biareal
aboard
metacentric
inashi
apart
frontofrontal
double-oblique
intraduodenal
side by each
board and board
biconditional
intraduodenally
duodenally
abreast
sclerotise
biradial
sclerose
across