| term | pronunciation | English |
|---|
| 口 | くち | mouth |
| 入口 | いりぐち | an entrance |
| 南口 | みなみぐち | the south gate |
| 北口 | きたぐち | the north gate |
| 人口 | じんこう | population |
| 出口 | でぐち | exit |
| 出入口 | でいりぐち | exit and entrance |
| 利口 | りこう | clever, shrewd, bright, sharp, wise, intelligent |
| 口実 | こうじつ | pretext |
| 川口 | かわぐち | rivermouth |
| 口座 | こうざ | account |
| 悪口 | わるくち | abuse, insult, slander, evil speaking |
| 戸口 | とぐち | doorway |
| 早口 | はやくち | fast-talking |
| 東口 | ひがしぐち | the east gate |
| 窓口 | まどぐち | ticket window |
| 口答え | くちごたえ | retort |
| 口紅 | くちべに | lipstick |
| 口絵 | くちえ | frontispiece |
| 西口 | にしぐち | the west gate |
| 口説く | くどく | to talk someone into agreeing |
| 口が軽い | くちがかるい | have a loose tongue |
| 銀行口座 | ぎんこうこうざ | a bank account |
| お猪口 | おちょこ | small cup, sake cup; cup-shaped |
| 中央口 | ちゅうおうぐち | central entrance |
| 入り口 | いりぐち, いりくち, はいりぐち, はいりくち | entrance, entry, gate, approach, mouth |
| 冗談口 | じょうだんぐち | joke |
| 口凌ぎ | くちしのぎ | living from hand to mouth |
| 口唇 | こうしん | lips, labia |
| 口径 | こうけい | aperture, bore, calibre, caliber |
| 口忠実 | くちまめ | talkative, voluble |
| 口癖 | くちぐせ | way of saying, favorite phrase, favourite phrase |
| 口笛 | くちぶえ | whistle |
| 口臭 | こうしゅう | bad breath, halitosis |
| 口調 | くちょう | tone (e.g. of voice, etc.), (verbal) expression |
| 口述 | こうじゅつ | dictation, verbal statement |
| 口頭弁論 | こうとうべんろん | oral proceedings, oral pleadings |
| 坑口 | こうこう | pithead, minehead |
| 大口 | おおぐち | large amount, big mouth, tall talk |
| 宵の口 | よいのくち | nightfall, early evening |
| 御猪口 | おちょこ | small cup, sake cup; cup-shaped |
| 急須の口 | きゅうすのくち | spout of a teapot |
| 手口 | てぐち | modus operandi, criminal technique, trick |
| 河口 | かわぐち, かこう | mouth of river, estuary |
| 滝口 | たきぐち | top of a waterfall |
| 火口湖 | かこうこ | crater lake |
| 猪口 | ちょこ | small cup, sake cup |
| 猪口才 | ちょこざい | impertinence |
| 甘口 | あまくち | sweet flavour; flattery; stupidity |
| 秋口 | あきぐち | beginning of autumn, beginning of fall |
| 糸口 | いとぐち | thread end, beginning, clue |
| 虎口 | ここう | tiger's den, jaws of death, dangerous place |
| 蛇口 | じゃぐち | faucet, tap |
| 辛口 | からくち | dry taste (e.g. sake; salty (taste); harsh, scathing |
| 野口啄木鳥 | のぐちげら, ノグチゲラ | Okinawa woodpecker (Sapheopipo noguchii) |
| 陰口 | かげぐち | malicious gossip, backbiting, speaking ill behind someone's back |
| 鯉口 | こいぐち | mouth of a (sword) sheath |