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

関脇[sekiwake] wrestler of the third highest rank
口脇[kuchiwaki] edges of the mouth
小脇[kowaki] under one's arm
脇見[wakimi] looking from the side
両脇[ryouwaki] both sides

脇差し[wakizashi] short sword
脇腹[wakibara] side
脇役[wakiyaku] supporting role (actor)
脇毛[wakige] underarm hair