ローム層[roomusou] stratum of loam
亜成層圏[aseisouken] substratosphere
一層[issou] much more
沖積層[chuusekisou] alluvium
下層[kasou] lower strata (classes)

下層階級[kasoukaikyuu] proletariat
下層社会[kasoushakai] the underworld
下層土[kasoudo] subsoil
化石層[kasekisou] fossil bed
階層[kaisou] class

迦楼羅[karura] Garuda or Garua (man-bird deity and 'vahana' of Hindu-Buddhist myth)
画楼[garou] high decorated building
空中楼閣[kuuchuuroukaku] castle in the air
高楼[kourou] lofty (high) building
鐘楼[shourou] belfry

摩天楼[matenrou] skyscraper
楼閣[roukaku] multistoried building
楼門[roumon] two-storied gate
蜃気楼[shinkirou] mirage
望楼[bourou] watchtower

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