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

インディア紙[indiakami] India paper
クラフト紙[kurafutoshi] craft paper
ケント紙[kentoshi] Kent paper
リトマス試験紙[ritomasushikenshi] litmus paper
一紙半銭[isshihansen] small sum

陰画紙[ingashi] (photographic) printing paper
印刷紙[insatsushi] printing paper
印紙[inshi] (revenue) stamp
烏紙[karasugami] coarse dark-brown paper
黄表紙[kibyoushi] illustrated storybook with yellow covers (Edo period)

草臥れる[kutabireru] to get tired
遺草[isou] posthumous works
一年草[ichinensou] annual (plant)
詠草[eisou] draft poem
下草[shitakusa] undergrowth

仮名草紙[kanazoushi] story in the kana
伽草子[togizoushi] fairy-tale book
海草[kaisou] marine plant
乾草[kansou] hay
甘草[kanzou] liquorice