海鷂魚[ei] ray (fish)
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一天四海[ittenshikai] the world
雲海[unkai] sea of clouds
沿海[enkai] coast

遠海[enkai] deep sea
黄海[koukai] Yellow Sea
温海[atsumi] warm sea
海の幸[uminosachi] seafood

老麺[raamen] ramen (Chinese-style noodles)
家老[karou] chief retainer
棄老[kirou] old person thrown away in the mountains
敬老[keirou] respect for the aged
敬老の日[keirounohi] Respect-for-the-Aged Day Holiday (third Monday in September)

元老[genrou] elder statesman
元老院[genrouin] (Roman) senate
故老[korou] old people
車海老[kurumaebi] kuruma prawn (Marsupenaeus japonicus)
寿老人[juroujin] god of longevity

金利鞘[kinrishou] interest margin
元鞘[motosaya] returning to normal after all is said and done
朱鞘[shuzaya] red-lacquered sword sheath
腱鞘[kenshou] sheath of tendon
腱鞘炎[kenshouen] inflammation of a tendon (sheath)

値鞘[nezaya] margin
鞘当て[sayaate] rivalry (in love, touching of sheaths)
逆鞘[gyakuzaya] (discount rate) negative spread
鞘取り[sayatori] brokerage

鼺鼠[momi] giant flying squirrel (Petaurista leucogenys)
鼯鼠[momonga] small Eurasian flying squirrel (Pteromys momonga)
熬海鼠[iriko] dried sea slug
海鼠[namako] sea cucumber (Holothuroidea spp.)
栗鼠[risu] squirrel (excluding flying squirrels)

どぶ鼠[dobunezumi] brown rat (Rattus norvegicus)
黒鼠[kuronezumi] black rat
鼠の嫁入り[nezuminoyomeiri] light shower
鼠疫[soeki] plague