| Ostinato | ostinato |
| obstinat | obstinate |
| Stint | European smelt |
| Obstination | obstinacy obstination |
| Ordinate | ordinate |
| Spinat | spinach |
| Hosting | hosting |
| Ostasiat | East Asian |
| Ostende | Ostend |
| Ostindien | East Indies |
| Ostmark | ostmark |
| Ostrau | Ostrava |
| Ostrava | Ostrava |
| Kostenart | cost element |
| Osten | east |
| Ostgote | Ostrogoth |
| Osthang | eastern slope |
| Ostküste | east coast |
| Ostseite | east side |
| Ostwind | east wind easterly wind |