| Oper | opera |
| Köper | twill |
| Operator | operator administrator |
| Operette | operetta |
| operabel | operable |
| operativ | surgical operative operational strategic |
| per | via by |
| aper | snowless clear of snow free of snow |
| Opernglas | opera glasses |
| Zope | zope |
| Dope | dope |
| Göpel | horse-gin |
| Moped | moped |
| Myoper | myopic |
| Operation | surgery operation |
| Opernhaus | opera house opera |
| Popel | bogey |
| dopen | dope |
| operieren | operate |
| proper | proper |