• 口くち

  mouth

• 口紅くちべに

  lipstick

• 口座こうざ

  account (e.g. bank)

• 口実こうじつ

  excuse, pretext

• 口径こうけい

  aperture, bore, calibre, caliber

• 口頭こうとう

  oral, verbal, spoken, parol

• 口調くちょう

  tone (of voice), manner of talking

• 口述こうじゅつ

  dictation, verbal statement

• 口々くちぐち

  every person, every mouth

• 口笛くちぶえ

  whistle (sound made with the lips)

• 口論こうろん

  quarrel, argument, row, (verbal) dispute

• 口先くちさき

  lip service, mere words, professions

• 口癖くちぐせ

  pet saying, favorite phrase, stock phrase, catchphrase

• 口火くちび

  fuse, pilot light

• 口語こうご

  spoken language, colloquial speech

• 口上こうじょう

  vocal message, speech, statement

• 口数くちかず

  number of words a person speaks

• 滝口たきぐち

  top of a waterfall

• 傷口きずぐち

  (opening of a) wound, cut

• 辛口からくち

  dry taste (e.g. sake, wine)

• 水口みずぐち

  spout

• 早口はやくち

  fast-talking, rapid talking

• 利口りこう

  clever, intelligent, bright, smart, wise, sensible, shrewd

• 人口じんこう

  population

• 大口おおぐち

  big mouth, mouth opened wide

• 悪口あっこう

  (verbal) abuse, name-calling, abusive language, insulting remarks

• 一口ひとくち

  mouthful, morsel, bite

• 悪口わるぐち

  (verbal) abuse, speaking ill of people, bad-mouthing, name-calling, slander, abusive language, insulting remarks

• 窓口まどぐち

  counter, window, teller window, ticket window

• 西口にしぐち

  west entrance, west exit

• 河口かこう

  mouth of river, estuary

• 糸口いとぐち

  beginning, start, first step

• 秋口あきぐち

  beginning of autumn, beginning of fall

• 閉口へいこう

  to be stumped, to be at a loss, to be at one's wits' end, to be nonplussed

• 小口こぐち

  cut end, edge (of a page, etc.)

• 出口でぐち

  exit, way out

• 開口かいこう

  opening, aperture (e.g. camera)

• 手口てぐち

  modus operandi, criminal technique, trick

• 東口ひがしぐち

  east entrance, east exit

• 南口みなみぐち

  south entrance, south exit

• 北口きたぐち

  north entrance, north exit

• 戸口とぐち

  door, doorway

• 間口まぐち

  frontage, width (of a building, plot of land, etc.)

• 蛇口じゃぐち

  faucet, tap

• 陰口かげぐち

  malicious gossip, backbiting, speaking ill behind someone's back

• 無口むくち

  taciturn, reticent, quiet, silent, untalkative

• 裏口うらぐち

  backdoor, rear entrance, rear exit

• 火口ひぐち

  burner, nozzle, origin of a fire

• 口答えくちごたえ

  retort, back talk, backchat

• 口ぶりくちぶり

  way of speaking