(ào) Austria; Austrian; abbr. for 奧地利|奥地利[Ao4 di4 li4]; Olympic; Olympics; abbr. for 奧林匹克|奥林匹克[Ao4 lin2 pi3 ke4]
(ào) obscure; mysterious
(àodīng) Odin (god in Norse mythology)
(àodīngxiézhènqì) Oudin coil; Oudin resonator
(àoshí) Osh (city in Kyrgyzstan)
(àokèlāhémǎzhōu) Oklahoma
(àokèsīnàdé) Oxnard, California
(àokèsūsīhé) Oxus River; alternative name for Amu Darya 阿姆河[A1 mu3 He2]
(àokèlán) Auckland (New Zealand city); Oakland (California, US city)
(àoqiēnuòsī) Oceanus, Titan God of the seas before Poseidon
(àolìào) Oreo cookies
(àolìān) Orion (constellation, loan word); also written 獵戶座|猎户座
(àoxiōngdìguó) Austro-Hungarian empire 1867-1918
(àogǔsīdū) Augustus (name)
(àoguó) Austria
(àodìlì) Austria
(àosètī) Ossetia (a Caucasian republic)
(àosāiluó) Othello, 1604 tragedy by William Shakespeare 莎士比亞|莎士比亚
(àomiào) subtle
(àomǔzhēnlǐjiào) Aum Shinrikyo, the Japanese death cult responsible for the 1995 sarin gas attack on the Tokyo subway
(àowěihuì) Olympic committee
(àowēiěr) Orwell (name); George Orwell (1903-1950), British novelist, author of Animal farm 動物農場|动物农场 and 1984 一九八四年
(àomìkèróng) omicron (Greek letter)
(àobāmǎ) Barack Obama (1961-), US Democrat politician, Senator for Illinois from 2005, president from 2009
(àobùlǐ) Aubrey (name)
(àokāngnèiěr) O'Connell (name); Daniel O'Connell (1775-1847), Irish nationalist and catholic activist
(àokāngnà) O'Connor (name); Thomas Power O'Connor (1848-1929), Irish journalist and nationalist political leader
(àodéxiūsī) Odysseus
(àodésài) Homer's Odyssey
(àotuō) Otto
(àosīdīng) Austin or Austen (name); Austin, Texas; also written 奧斯汀
(àosīkǎ) Oscar, The Academy of Motion Picture Arts and Sciences annual award; CL:屆|届[jie4]
(àosīkǎjīnxiàngjiǎng) Academy Awards; Oscars; CL:屆|届[jie4]
(àosīwēixīn) Auschwitz (concentration camp)
(àosīwēixīnjízhōngyíng) Auschwitz concentration camp
(àosīmàn) Ottoman (empire)
(àosīmàndìguó) the Ottoman empire
(àosītīng) Austin or Austen (name); Austin, Texas
(àosīwǎěrdé) Oswald
(àosīlù) Oslo, capital of Norway
(àolínpǐyà) Olympia (Greece)
(àolínpǐkè) Olympic
(àolínpǐkèjīngshén) Olympic spirit
(àolínpǐkèyùndònghuì) Olympic Games; the Olympics
(àolínpǐkèyùndònghuìzǔzhīwěiyuánhuì) Olympic organizing committee; abbr. to 奧組委|奥组委
(àolínpǐkètǐyùchǎng) Olympic Stadium
(àoěrbāní) Albany, New York
(àoěrbùlàitè) (Madeleine) Albright (US Secretary of State)
(àoěrdénídǎo) Alderney (Channel Islands)
(àoěrliáng) Orléans
(àotèmàn) Ultraman, Japanese science fiction superhero
(àotèlǎngtuō) Otranto city on the southeast heel of Italy
(àotèlǎngtuōhǎixiá) strait of Otranto between the heel of Italy and Albania
(àotèláisī) outlets (loanword); retail outlet (e.g. specializing in seconds of famous brands); factory outlet retail store
(àolú) Oulu (city in Finland)
(àomì) secret; mystery
(àomǐgā) omega (Greek letter Ωω)
(àomǐkěróng) omicron (Greek letter Οο)
(àozǔwěi) Olympic organizing committee; abbr. for 奧林匹克運動會組織委員會|奥林匹克运动会组织委员会
(àowéiyēduō) Oviedo (Asturian: Uviéu), capital of Asturias in northwest Spain
(àolánduō) Orlando
(àolánqúndǎo) Åland Islands, Finland
(àoxīnuósī) Oceanus, Titan God of the seas before Poseidon
(àolàiēn) Orion (NASA spacecraft)
(àosàiluó) Othello (play by Shakespeare)
(àodí) Audi
(àodíxiūsī) Odysseus, hero of Homer's Odyssey
(àojì) Holy mystery; Holy sacrament (of Orthodox church)
(àoyùn) abbr. for 奧林匹克運動會|奥林匹克运动会; Olympic Games; the Olympics
(àoyùngōnghuòshāng) supply of Olympic merchandise
(àoyùnchéngshì) Olympic city
(àoyùnhuì) abbr. for 奧林匹克運動會|奥林匹克运动会; Olympic Games; the Olympics
(àoyùncūn) Olympic Village
(àoyùnsài) Olympic competition
(àolǐsàbāng) Orissa, eastern Indian state bordering Bangladesh
(àolǐlǐyà) Aurelia, a hypothetical planet
(àotáoxì) Ordovician system (geology); see 奧陶紀|奥陶纪
(àotáojì) Ordovician (geological period 495-440m years ago)
(àomǎhā) Omaha
(àomǎěr) Omar (Arabic name)
(àodàilì) Audrey; variant of 奧黛麗|奥黛丽
(àodàilì) Audrey