| 1 | 人口 | 人口 | rén kǒu | ren2 kou3 | population; people | | |
| 2 | 口 | 口 | kǒu | kou3 | mouth; classifier for things with mouths (people, domestic animals, cannons, wells etc); classifier for bites or mouthfuls | | |
| 3 | 出口 | 出口 | chū kǒu | chu1 kou3 | an exit; Classifiers: 个 ; to speak; to export; (of a ship) to leave port | | |
| 4 | 进口 | 進口 | jìn kǒu | jin4 kou3 | to import; imported; entrance; inlet (for the intake of air, water etc) | | |
| 5 | 门口 | 門口 | mén kǒu | men2 kou3 | doorway; gate; Classifiers: 个 | | |
| 6 | 口号 | 口號 | kǒu hào | kou3 hao4 | slogan; catchphrase; Classifiers: 个 | | |
| 7 | 开口 | 開口 | kāi kǒu | kai1 kou3 | to open one's mouth; to start to talk | | |
| 8 | 一口气 | 一口氣 | yī kǒu qì | yi1 kou3 qi4 | one breath; in one breath; at a stretch | | |
| 9 | 口袋 | 口袋 | kǒu dài | kou3 dai4 | pocket; bag; sack; Classifiers: 个 | | |
| 10 | 口腔 | 口腔 | kǒu qiāng | kou3 qiang1 | oral cavity | | |
| 11 | 一口 | 一口 | yī kǒu | yi1 kou3 | readily; flatly (deny, admit and so on); a mouthful; a bite | | |
| 12 | 口语 | 口語 | kǒu yǔ | kou3 yu3 | colloquial speech; spoken language; vernacular language; slander; gossip; Classifiers: 门 | | |
| 13 | 港口 | 港口 | gǎng kǒu | gang3 kou3 | port; harbor | | |
| 14 | 户口 | 戶口 | hù kǒu | hu4 kou3 | population (counted as number of households for census or taxation); registered residence; residence permit; (in Hong Kong and Macau) bank account | | |
| 15 | 伤口 | 傷口 | shāng kǒu | shang1 kou3 | wound; cut | | |
| 16 | 口头 | 口頭 | kǒu tóu | kou3 tou2 | oral; verbal | | |
| 17 | 借口 | 借口 | jiè kǒu | jie4 kou3 | to use as an excuse; on the pretext; excuse; pretext; also written 借口 ; to use as an excuse; on the pretext; excuse; pretext | | |
| 18 | 汉口 | 漢口 | hàn kǒu | Han4 kou3 | Hankou, part of Wuhan 武汉 at the junction of Han river and Changjiang in Hubei | | |
| 19 | 缺口 | 缺口 | quē kǒu | que1 kou3 | nick; jag; gap; shortfall | | |
| 20 | 张口 | 張口 | zhāng kǒu | zhang1 kou3 | to open one's mouth (to eat, speak etc); to gape; to start talking (esp. to make a request) | | |
| 21 | 河口 | 河口 | hé kǒu | he2 kou3 | estuary; the mouth of a river | | |
| 22 | 口径 | 口徑 | kǒu jìng | kou3 jing4 | caliber; diameter of opening | | |
| 23 | 口吻 | 口吻 | kǒu wěn | kou3 wen3 | tone of voice; connotation in intonation; accent (regional etc); snout; muzzle; lips; protruding portion of an animal's face | | |
| 24 | 大口 | 大口 | dà kǒu | da4 kou3 | big mouthful (of food, drink, smoke etc); open mouth; gulping; gobbling; gaping | | |
| 25 | 两口子 | 兩口子 | liǎng kǒu zi | liang3 kou3 zi5 | husband and wife | | |