| 两样东西 | liǎng yàng dōng xi | two distinct things |
| 切尔西 | Qiè ěr xī | Chelsea |
| 加利西亚 | Jiā lì xī yà | Galicia, province and former kingdom of northwest Spain |
| 加德西 | jiā dé xī | Gardasil (HPV vaccine) |
| 劳拉西泮 | láo lā xī pàn | lorazepam |
| 北大西洋 | Běi Dà xī yáng | North Atlantic |
北大西洋・公约・
组织 | Běi Dà xī yáng · gōng yuē · zǔ zhī | North Atlantic Treaty Organization, NATO |
| 南西诸岛 | Nán xī zhū dǎo | Ryukyu islands; Okinawa 冲绳 and other islands of modern Japan |
| 博伊西 | Bó yī xī | Boise, Idaho |
| 卡波西氏肉瘤 | kǎ bō xī shì ròu liú | Kaposi's sarcoma |
| 卡西尼 | Kǎ xī ní | Cassini (proper name) |
| 卡西欧 | Kǎ xī ōu | Casio |
| 卡西米尔效应 | Kǎ xī mǐ ěr xiào yìng | Casimir effect (attraction between two parallel metal plates due to quantum mechanical vacuum effects) |
| 卡西莫夫 | Kǎ xī mò fū | Kasimov (town in Russia) |
| 印度尼西亚语 | Yìn dù ní xī yà yǔ | Indonesian language |
| 可可西里 | Kě kě xī lǐ | Hoh Xil or Kekexili, vast nature reserve on Qinghai-Tibetan Plateau 青藏高原 |
| 台西 | Tái xī | Taixi or Taihsi township in Yunlin county 云林县, Taiwan |
| 台西乡 | Tái xī xiāng | Taixi or Taihsi township in Yunlin county 云林县, Taiwan |
| 史黛西 | Shǐ dài xī | Stacy (name) |
| 各奔东西 | gè bèn dōng xī | to go separate ways (idiom); to part ways with someone |
| 向西南 | xiàng xī nán | southwestward |
| 吡拉西坦 | bǐ lā xī tǎn | piracetam (loanword); see 乙酰胺吡咯烷酮 |
| 呋喃西林 | fū nán xī lín | furacilinum |
| 哈普西科德 | hā pǔ xī kē dé | harpsichord |
| 哈西纳 | Hā xī nà | Ms Sheikh Hasina (1947-), Bangladesh politician, prime minister 1996-2001 and from 2008 |
| 喝西北风 | hē xī běi fēng | lit. drink the northwest wind (idiom); cold and hungry |
| 图西族 | Tú xī zú | Tutsi, an ethnic group in Rwanda and Burundi |
| 地西泮 | dì xī pàn | Valium; diazepam |
| 城西区 | Chéng xī qū | west city district; Chengxi district of Xining city 西宁市, Qinghai |
| 墨西哥人 | Mò xī gē rén | Mexican |
| 墨西拿 | Mò xī ná | Messina, Sicilian city |
| 墨西拿海峡 | Mò xī ná hǎi xiá | strait of Messina between Calabria and Sicily |
| 坏东西 | huài dōng xi | bastard; scoundrel; rogue |
| 夕阳西下 | xī yáng xī xià | the sun sets in the west (idiom) |
| 大唐西域记 | Dà Táng Xī yù jì | Report of the regions west of Great Tang; travel record of Xuan Zang 玄奘 |
| 大西国 | Dà xī guó | Atlantis |
| 大西庇阿 | Dà xī bì ā | Scipio Africanus (235-183 BC), Roman general and statesman |
| 大西洋中脊 | Dà xī yáng zhōng jǐ | Atlantic mid-ocean ridge |
| 大西洋国 | Dà xī yáng guó | Historical name for Portugal during the Qing dynasty |
| 大西洋洋中脊 | Dà xī yáng yáng zhōng jǐ | Atlantic mid-ocean ridge |
| 奥西娜斯 | Ào xī nuó sī | Oceanus, Titan God of the seas before Poseidon |
| 宇普西龙 | yǔ pǔ xī lóng | upsilon (Greek letter Υυ) |
| 安西 | Ān xī | Anxi county, former name of Guazhou county 瓜州县 in Jiuquan 酒泉, Gansu |
| 安西县 | Ān xī xiàn | Anxi county, former name of Guazhou county 瓜州县 in Jiuquan 酒泉, Gansu |
| 定西 | Dìng xī | Dingxi prefecture level city in Gansu |
| 定西地区 | Dìng xī dì qū | Dingxi prefecture in Gansu |
| 定西市 | Dìng xī shì | Dingxi prefecture level city in Gansu |
| 客西马尼园 | Kè xī mǎ ní yuán | Garden of Gethsemane |
| 客西马尼花园 | Kè xī mǎ ní huā yuán | Garden of Gethsemane (in the Christian passion story) |
| 密克罗尼西亚 | Mì kè luó ní xī yà | Micronesia in southwest pacific |
