宇宙帽[uchuubou] space helmet
烏帽子[eboshi] black-lacquered headgear (made of silk, cloth or paper) originally worn by court nobles in ancient Japan, and afterwards spreading to the common people
夏帽子[natsuboushi] summer hat
角帽[kakubou] mortarboard
学帽[gakubou] school cap

軍帽[gunbou] military cap
三角帽[sankakubou] three-cornered hat
制服制帽[seifukuseibou] cap and uniform
制帽[seibou] regulation cap
正帽[seibou] cap of a uniform

お生憎様[oainikusama] that's too bad (ironical)
御誕生日おめでとうございます[otanjoubiomedetougozaimasu] Happy Birthday
隣の芝生は青い[tonarinoshibafuhaaoi] the grass is always greener on the other side
生きがいい[ikigaii] fresh (e.g. fish)
コンピューター援用生産[konpyuutaaenyouseisan] computer-aided manufacture

委託生[itakusei] scholarship student sent by government office or business
生す[nasu] to build up
異常発生[ijouhassei] plague
医学生[igakusei] medical student
医学生物学[igakuseibutsugaku] medical biology