| 1 | 欧洲 | 歐洲 | ōu zhōu | Ou1 zhou1 | Europe; abbr. for 欧罗巴洲 | | |
| 2 | 欧美 | 歐美 | ōu měi | Ou1 Mei3 | Europe and America; the West | | |
| 3 | 欧姆 | 歐姆 | ōu mǔ | ou1 mu3 | ohm (loanword) | | |
| 4 | 欧 | 歐 | ōu | ou1 | Europe; abbr. for 欧洲 ; surname Ou; (used for transliteration); old variant of 讴 | | |
| 5 | 欧咪呀给 | 歐咪呀給 | ōu mī yā gěi | ou1 mi1 ya1 gei3 | (Tw) gift given when visiting sb (esp. a local specialty brought back from one's travels, or a special product of one's own country taken overseas) (loanword from Japanese "omiyage") | | |
| 6 | 欧纳西斯 | 歐納西斯 | ōu nà xī sī | Ou1 na4 xi1 si1 | see 奥纳西斯 | | |
| 7 | 欧猪 | 歐豬 | ōu zhū | Ou1 zhu1 | (economics) (derog.) PIGS (Portugal, Italy, Greece and Spain); PIIGS (Portugal, Italy, Ireland, Greece and Spain) | | |
| 8 | 欧分 | 歐分 | ōu fēn | ou1 fen1 | euro cent | | |
| 9 | 欧莱雅 | 歐萊雅 | ōu lái yǎ | Ou1 lai2 ya3 | L'Oréal (French cosmetics company) | | |
| 10 | 欧拉 | 歐拉 | ōu lā | Ou1 la1 | Leonhard Euler (1707-1783), Swiss mathematician | | |
| 11 | 欧金翅雀 | 歐金翅雀 | ōu jīn chì què | Ou1 jin1 chi4 que4 | (bird species of China) European greenfinch (Chloris chloris) | | |
| 12 | 欧几里得 | 歐幾里得 | ōu jǐ lǐ dé | Ou1 ji3 li3 de2 | Euclid of Alexandria (c. 300 BC), Greek geometer and author of Elements 几何原本 ; Euclid of Alexandria (c. 300 BC), Greek geometer and author Elements 几何原本 | | |
| 13 | 欧吉桑 | 歐吉桑 | ōu jí sāng | ou1 ji2 sang1 | older man; man of mature years (Japanese loanword) | | |
| 14 | 欧冠 | 歐冠 | ōu guàn | Ou1 Guan4 | UEFA Champions League | | |
| 15 | 欧共体 | 歐共體 | ōu gòng tǐ | Ou1 gong4 ti3 | abbr. for 欧洲共同体 , European Community (old term for the EU, European Union) | | |
| 16 | 欧风东渐 | 歐風東漸 | ōu fēng dōng jiàn | ou1 feng1 dong1 jian4 | European influences flow east (idiom) | | |
| 17 | 欧蝶鱼 | 歐蝶魚 | ōu dié yú | ou1 die2 yu2 | plaice | | |
| 18 | 欧当归 | 歐當歸 | ōu dāng guī | Ou1 dang1 gui1 | (botany) lovage; Levisticum officinale | | |
| 19 | 欧车前 | 歐車前 | ōu chē qián | ou1 che1 qian2 | psyllium (genus Plantago) | | |
| 20 | 欧伯林 | 歐伯林 | ōu bó lín | Ou1 bo2 lin2 | Oberlin; Oberlin | | |
| 21 | 欧泊 | 歐泊 | ōu bó | ou1 bo2 | opal (Sanskrit: upala) | | |
| 22 | 欧斑鸠 | 歐斑鳩 | ōu bān jiū | Ou1 ban1 jiu1 | (bird species of China) European turtle dove (Streptopelia turtur) | | |
| 23 | 欧巴桑 | 歐巴桑 | ōu ba sāng | ou1 ba5 sang1 | older female; woman of mature years (Japanese loanword) | | |
| 24 | 欧巴马 | 歐巴馬 | ōu bā mǎ | Ou1 ba1 ma3 | Taiwanese variant of 奥巴马 , Barack Obama (1961-), US Democrat politician, president 2009-2017 | | |
| 25 | 欧巴 | 歐巴 | ōu bā | ou1 ba1 | (female usage) older brother (loanword from Korean "oppa"); male friend | | |