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

データの先頭[deetanosentou] beginning of data
一頭[ittou] one large animal (horses, cattle, etc.)
一頭立て[ittoudate] one-horse (carriage)
咽頭[intou] pharynx
駅頭[ekitou] station

音頭[ondo] leading a group of people
会頭[kaitou] society president
街頭[gaitou] in the street
核弾頭[kakudantou] nuclear warhead
巻頭[kantou] opening page of book

鷲座[washiza] Aquila (constellation)
鷲づかみ[washizukami] grabbing hold
鷲鼻[washibana] aquiline nose
狗鷲[inuwashi] golden eagle (Aquila chrysaetos)
禿鷲[hagewashi] Old World vulture

白頭鷲[hakutouwashi] bald eagle (Haliaeetus leucocephalus)
尾白鷲[ojirowashi] white-tailed eagle (Haliaeetus albicilla)
大鷲[oowashi] Steller's sea eagle (Haliaeetus pelagicus)
白襟禿鷲[shiroerihagewashi] griffon vulture (Gyps fulvus)