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

一呑み[hitonomi] swallowing in one gulp
呑口[nomikuchi] taste (of a liquid, esp. alcoholic beverages)
呑み代[nomishiro] drink money
呑む[nomu] to drink
呑み助[nomisuke] tippler

鵜呑み[unomi] swallowing (food, story)
雲呑[wantan] wonton (Chinese dumpling)
丸呑み[marunomi] swallowing whole
険呑[kennon] risky
固唾を呑む[katazuwonomu] to hold one's breath (in fear, anxiety, etc.)