| oblat | wafer |
| oblatask | pyx |
| obleka | clothing |
| oblekt | semibleached |
| obligation | bond |
| obligationsinnehavare | bondholder |
| obligatorisk | peremptory |
| Obligatorisk svenskundervisning i Finland | Mandatory Swedish |
| Obligatoriskt valdeltagande | Compulsory voting |
| oblodig | bloodless |
| Oblomov | Oblomov |
| oblyg | blatant |
| oblyghet | arrogance |
| oblygt | barefacedly |
| Obninsk | Obninsk |
| Obock | Obock Region |
| oboe | oboe |
| oboist | oboist |
| obotfärdig | impenitent |
| obotfärdighet | impenitence |
| obotlig | irreparable |
| Obotriter | Obotrites |
| Obrenovac | Obrenovac |
| obrukad | fallow |
