御猪口[ochoko] small cup
片口鰯[katakuchiiwashi] Japanese anchovy (Engraulis japonica)
白口[shiroguchi] white croaker (Pennahia argentata)
悪たれ口[akutareguchi] abuse
悪口雑言[akkouzougon] all kinds of malicious gossip

異口同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice
ひと口[hitokuchi] mouthful
一口商い[hitokuchiakinai] an immediate definite deal
一口同音[ikkudouon] reading in unison

錦鯉[nishikigoi] coloured carp
真鯉[magoi] black carp
緋鯉[higoi] red carp
鯉幟[koinobori] carp streamer
鯉口[koiguchi] mouth of a (sword) sheath

養鯉[youri] carp breeding
俎の鯉[manaitanokoi] confronted with a hopeless situation
鯉ヘルペスウイルス[koiherupesuuirusu] koi herpes virus (KHV)
寒鯉[kangoi] koi carp caught during the cold season