| ostentativ | ostentatious ostentation |
| tentativ | tentative |
| ostensiv | ostensive |
| Potentatin | potentate |
| katenativ | catenative |
| Ostasiatin | East Asian |
| Ostinato | ostinato |
| Osteroktav | Octave of Easter |
| Ostertag | Easter Day |
| Stettin | Szczecin Stettin |
| Attentat | assassination attempt |
| Attentäter | assassin |
| Potentat | potentate |
| Augmentativ | augmentative |
| Orientalin | Oriental |
| fermentativ | fermental fermentative zymotic enzymatic |
| Optativ | optative optative mood |
| Stativ | tripod |
| denotativ | denotative |
| vegetativ | vegetative |