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

附箋[fusen] tag
便箋[binsen] writing paper
処方箋[shohousen] prescription (medical)
用箋[yousen] stationery

書翰箋[shokansen] letter paper
鄭箋[teisen] commentary on the Book of Odes by Zheng Xuan
薬箋[yakusen] prescription