小便をする[shoubenwosuru] to pee
穏便[onbin] gentle
音便[onbin] euphony
花便り[hanadayori] news of cherry blossom blooming conditions
簡便[kanben] handy

雁の便り[karinotayori] (a) letter
共同便所[kyoudoubenjo] comfort station
軽便[keiben] convenience
検便[kenben] stool (feces) examination
公衆便所[koushuubenjo] public lavatory

ローロー船[rooroofune] roll-on-roll-off ship
宇宙船[uchuusen] space ship
下船[gesen] going ashore
荷船[nibune] freighter
貨物船[kamotsusen] freighter

艦船[kansen] (ocean) vessels
汽船[kisen] steamship
客船[kyakusen] passenger boat
巨船[kyosen] ocean liner
漁船[gyosen] fishing boat

井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
雨蛙[amagaeru] tree frog (esp. the Japanese tree frog, Hyla japonica)
蛙の子は蛙[kaerunokohakaeru] like father, like son
蛙跳び[kaerutobi] (game of) leapfrog
殿様蛙[tonosamagaeru] black-spotted pond frog (Rana nigromaculata)

蟇蛙[hikigaeru] toad (esp. the Japanese toad, Bufo japonicus)
蛙又[kaerumata] curved wooden support on top of the main beam of a house, now mainly decorative (shape evocates an open-legged frog)
青蛙[aogaeru] green (tree) frog
赤蛙[akagaeru] any brown or reddish-brown frog (esp. of family Ranidae)

書留郵便[kakitomeyuubin] registered mail
定形郵便物[teikeiyuubinbutsu] standard size mail
年賀郵便[nengayuubin] New Year's mail
郵政省[yuuseishou] Ministry of Posts and Telecommunications
郵政大臣[yuuseidaijin] Minister of Posts and Telecommunications

郵税[yuuzei] postage
郵送[yuusou] mailing
郵送料[yuusouryou] freight costs
郵袋[yuutai] mailbag
郵便為替[yuubinkawase] postal money order