| Obligo | commitment |
| obligat | obligatory inevitable |
| Sligo | Sligo |
| ölig | oily |
| Loblied | hymn |
| Oblong | oblong |
| löblich | commendable laudable |
| Oblast | oblast |
| Oblate | oblate |
| obliegen | be somebody's responsibility apply oneself to a task |
| obliviös | forgetful |
| Blimp | blimp |
| Blind | blind |
| blind | blind sightless blinded opaque |
| Blick | glance glimpse peek peep view look |
| Blide | balance |
| Blini | blin |
| Blitz | lightning flash |
| neblig | foggy misty brumous |
| üblich | usual |