九穀[kyuukoku] the nine grains
五穀[gokoku] the 5 grains (wheat, rice, beans, millet (awa and kibi))
穀食[kokushoku] cereal diet
穀倉[kokusou] granary
穀物[kokumotsu] grain

穀粉[kokufun] grain (rice) flour
穀粒[kokuryuu] kernel
穀類[kokurui] grains
脱穀[dakkoku] threshing (e.g. rice)
脱穀機[dakkokuki] threshing machine

異類[irui] varieties
一類[ichirui] same kind
円虫類[enchuurui] round worms
塩類[enrui] salts
塩類溶液[enruiyoueki] saline

貝類[kairui] shellfish
柑橘類[kankitsurui] citrus fruits
希土類[kidorui] rare earth
魚貝類[gyokairui] marine products
魚類[gyorui] fish