亜炭[atan] lignite
一酸化炭素[issankatanso] carbon monoxide
活性炭[kasseitan] activated charcoal
褐炭[kattan] brown coal
含水炭素[gansuitanso] carbohydrate

黒炭[kokutan] bituminous coal
採炭[saitan] coal mining
載炭[saitan] coaling
重炭酸曹達[juutansansouda] sodium bicarbonate
出炭[shuttan] coal production

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