亜科[aka] subfamily
医科[ika] medical science
医科大学[ikadaigaku] medical school
家庭科[kateika] home economics
科名[kamei] family name

科する[kasuru] to inflict
科学[kagaku] science
科学院[kagakuin] science institute
科学技術[kagakugijutsu] science and technology

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

藺草[igusa] soft rush (Juncus effusus var. decipiens)
藺草科[igusaka] Juncaceae (the rush family)
蛍藺[hotarui] Scirpus hotarui (species of bulrush)

太藺[futoi] softstem bulrush (Scirpus tabernaemontani)
アンペラ藺[anperai] Machaerina rubiginosa (species of tropical sedge)
綾藺笠[ayaigasa] type of traditional Japanese conical hat