| osmyckad | plain |
| osmältbar | indigestible |
| Osnabrück | Osnabrück |
| osnygg | dirty |
| osocial | antisocial |
| osofistikerad | unsophisticated |
| Osogna | Osogna |
| osorterade | unsorted |
| osportslig | unsportsmanlike |
| ospärrad | unconstrained |
| Osram | Osram |
| Osrhoëniska riket | Osroene |
| oss | ourselves |
| oss själva | ourselves |
| Ossa | Ossa |
| OSSE | Organization for Security and Co-operation in Europe |
| Ossetiska | Ossetic language |
| Ossi | Ossi |
| Ossian | Ossian |
| Ossip Zadkine | Ossip Zadkine |
| ost | cheese |
| ost-nordost | east-northeast |
| ost-sydost | east-southeast |
| ostabil | volatile |
| ostadig | groggy |
| ostadighet | instability |
| ostadigt | unsteadily |
| Ostafievo internationella flygplats | Ostafievo International Airport |
