双節棍[nunchaku] nunchaku (two linked fighting sticks)
一双[issou] pair (esp. of folding screens)
一卵性双生児[ichiranseisouseiji] identical twins
双紙[soushi] written work (esp. a bound text, as opposed to a scroll)
自己双対[jikosoutsui] self dual

双刃[moroha] double-edged
双暗車[souansha] twin propellers
双殻類[soukakurui] bivalves
双眼[sougan] both eyes

韻脚[inkyaku] metrical foot (poet.)
下脚[kakyaku] legs
火脚[hiashi] spreading of a fire
脚韻[kyakuin] rhyme
脚気[kakke] beriberi

脚色[kyakushoku] dramatization (e.g. film)
脚線美[kyakusenbi] beauty of slender female legs
脚註[kyakuchuu] footnote
脚付き[ashitsuki] something (equipped) with legs
脚部[kyakubu] leg