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

スポーツ新聞[supootsushinbun] sporting newspaper
悪徳新聞[akutokushinbun] irresponsible newspaper
逸聞[itsubun] something unheard of
叡聞に[eibunni] (in the) emperor's hearing
下聞[kabun] enquiring beforehand

下聞き[shitagiki] enquiring beforehand
寡聞[kabun] limited information
怪聞[kaibun] strange rumor
外聞[gaibun] reputation
旧聞[kyuubun] old news