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

滝壺[takitsubo] basin under a waterfall
便壺[bentsubo] night-soil vault
火消壺[hikeshitsubo] charcoal extinguisher
骨壺[kotsutsubo] funerary urn
金壺眼[kanatsubomanako] goggle-eyes

茶壺[chatsubo] tea urn
消し壺[keshitsubo] (jar used as a) charcoal extinguisher
蛸壺[takotsubo] octopus pot
痰壺[tantsubo] spittoon