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

一幅[ippuku] (a) scroll
横幅[yokohaba] breadth
画幅[gafuku] picture scroll
格幅[kappuku] physique
肩幅[katahaba] shoulder width (breadth)

三幅対[sanpukutsui] set of three
紙幅[shifuku] space assigned for something (e.g. for article in magazine)
振り幅[furihaba] amplitude (of vibration)
振幅変調[shinpukuhenchou] amplitude modulation
戦闘正面幅[sentoushoumenhaba] frontage