| Osterei | Easter egg |
| Osteria | osteria |
| Ostern | Easter Passover |
| Osterzeit | Easter |
| rostfrei | rustless rustproof |
| Esterel | Esterel Massif Massif de l'Esterel |
| Försterei | forestry |
| Raterei | guesswork |
| Ostende | Ostend |
| Ostler | Oriental |
| Ostlerin | Oriental |
| Ostrau | Ostrava |
| osteo- | osteo- |
| Osten | east |
| Osterfest | Easter |
| Osterluzei | birthwort |
| Ostertag | Easter Day |
| Ostsee | Baltic Sea |
| Poster | poster |
| frostfrei | frost-free |