| Oscar Hammerstein II | Oscar Hammerstein II |
| Oscar Hernández | Oscar Hernandez |
| Oscar Ier de Suède | Oscar I of Sweden |
| Oscar II de Suède | Oscar II of Sweden |
| Oscar Levi Strauss | Levi Strauss |
| Oscar Luigi Scalfaro | Oscar Luigi Scalfaro |
| Oscar Montelius | Oscar Montelius |
| Oscar Míguez | Oscar Míguez |
| Oscar Niemeyer | Oscar Niemeyer |
| Oscar Ortiz | Oscar Alberto Ortiz |
| Oscar Peterson | Oscar Peterson |
| Oscar pour une performance spéciale | Academy Special Achievement Award |
| Oscar Rapace | Emil Eagle |
| Oscar Rieding | Oskar Rieding |
| Oscar Robertson | Oscar Robertson |
| Oscar Romero | Óscar Romero |
| Oscar Temaru | Oscar Temaru |
| Oscar Troplowitz | Oscar Troplowitz |
| Oscar Venceslas de Lubicz-Milosz | Oscar Milosz |
| Oscar Washington Tabarez | Oscar Tabárez |
| Oscar Washington Tabárez | Oscar Tabárez |
| Oscar Wilde | Oscar Wilde |
| Oscar Xavier Schlömilch | Oscar Schlömilch |
| Oschatz | Oschatz |
| oscillant | oscillatory |
| oscillateur | oscillator |
| Oscillateur Clapp | Clapp oscillator |
| Oscillateur Colpitts | Colpitts oscillator |
| Oscillateur contrôlé par entrée digitale | Numerically-controlled oscillator |
| Oscillateur harmonique quantique | Quantum harmonic oscillator |
| Oscillateur Hartley | Hartley oscillator |
| Oscillateur paramétrique optique | Optical parametric oscillator |
| oscillation | swing |
| Oscillation de Madden-Julian | Madden-Julian oscillation |
| Oscillation de periode cinq m | Five minute oscillations |
| Oscillation du neutrino | Neutrino oscillation |
| Oscillation rapide | Rapid oscillation |
| Oscillation solaire | Solar oscillation |
| Oscillation stellaire | Stellar oscillation |
| oscillatoire | oscillatory |
| osciller | swing |
| Osco | Osco |
| osculation | osculation |
| Ose | Sugar |
| Oseberg | Oseberg oil field |
| Osechi | Osechi |
| Osei Toutou | Osei Kofi Tutu I |
| oseille | bread |
| Osella | Osella |
| Oseltamivir | Oseltamivir |
| oser | dare |
| Oser attaquer | Dare to fight |
| Oser parler | To venture out |
| oser se dire | call oneself |
| Oser sortir de | To venture out |
| Osečina | Osečina |
| Osgiliath | Osgiliath |
