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

加答児[kataru] catarrh
ステップ応答[suteppuoutou] step response
一問一答[ichimonittou] answering question by question
応答[outou] reply
応答能[outounou] competence

押し問答[oshimondou] dispute
解答[kaitou] answer
回答[kaitou] reply
回答者[kaitousha] respondent
確答[kakutou] definite answer