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

悪銭[akusen] ill-gotten money
一紙半銭[isshihansen] small sum
金銭[kinsen] money
金銭的ダメージ[kinsentekidameeji] monetary damages
古銭[kosen] old coin

古銭学[kosengaku] numismatics
口銭[kousen] commission
自動金銭出入機[jidoukinsenshutsunyuuki] automatic teller machine
借銭[shakusen] debt
守銭奴[shusendo] miser