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

円蓋[engai] cupola
掩蓋[engai] cover(ing)
火蓋[hibuta] apron of a gun
蓋し[kedashi] perhaps
蓋然性[gaizensei] probability

口蓋[kougai] palate
臭い物に蓋[kusaimononifuta] looking the other way
上げ蓋[agebuta] trap door
天蓋[tengai] canopy