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

ト音記号[toonkigou] G clef
ハ音記号[haonkigou] C clef
ヘ音記号[heonkigou] F clef
哀音[aion] sad voices
異音[ion] allophone

異句同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice
一音節[ichionsetsu] monosyllable
一口同音[ikkudouon] reading in unison
羽音[haoto] sound of flapping wings (of a bird)