| orättvisa | wrong |
| orättvist | unfairly |
| orörd | intact |
| orörlig | still |
| orörlighet | motionlessness |
| Orăştie | Orăştie |
| os | smell |
| Os kommun | Bone |
| osa | smell |
| osagd | unspoken |
| Osage | Osage Nation |
| Osage County | Osage County |
| Osaka | Osaka |
| Osaka prefektur | Osaka Prefecture |
| Osakabukten | Osaka Bay |
| Osakas tunnelbana | Osaka Municipal Subway |
| Osakeyhtiö | Osakeyhtiö |
| osaltad | unsalted |
| osammanhängande | discontinuous |
| Osamu Tezuka | Osamu Tezuka |
| Osan | Osan |
| osann | false |
| osanning | lie |
| osannolik | farfetched |
| osannolikhet | improbability |
| osant | untrue |
| Osborne House | Osborne House |
| Osborne Reynolds | Osborne Reynolds |
| Osby kommun | Osby Municipality |
| Oscar | Academy Award |
| Oscar Bernadotte | Count Oscar Bernadotte of Wisborg |
| Oscar de la Hoya | Oscar de la Hoya |
| Oscar Dominguez | Óscar Domínguez |
| Oscar Fredriks kyrka | Oscar Fredrik Church |
| Oscar Gustave Rejlander | Oscar Gustave Rejlander |
| Oscar Hammerstein | Oscar Hammerstein II |
| Oscar I | Oscar I of Sweden |
| Oscar II | Oscar II of Sweden |
| Oscar Luigi Scalfaro | Oscar Luigi Scalfaro |
| Oscar Montelius | Oscar Montelius |
| Oscar Niemeyer | Oscar Niemeyer |
| Oscar Pereiro | Óscar Pereiro |
| Oscar Peterson | Oscar Peterson |
| Oscar Reutersvärd | Oscar Reutersvärd |
| Oscar Robertson | Oscar Robertson |
| Oscar Temaru | Oscar Temaru |
| Oscar Wilde | Oscar Wilde |
| Oscarsborg | Oscarsborg Fortress |
| Osceola County | Osceola County |
| Oschatz | Oschatz |
| oscillation | oscillation |
| oscillator | oscillator |
