| Orthoepie | orthoepy |
| Orthopäde | orthopedist orthopaedist orthopaedic specialist orthopedic specialist orthopedic surgeon |
| Orthopädie | orthopaedics orthoorthopedicsaedics |
| Orthodoxie | Orthodoxy |
| Orthogon | rectangle |
| Orthorexie | orthorexia |
| Orthese | orthosis orthotic |
| Orthoptist | orthoptist |
| Orthopädin | orthopaedic specialist orthopaedist orthopedic specialist orthopedist |
| ortho- | ortho- |
| orthodox | orthodox |
| Atopie | atopy |
| Mätopie | dystopia |
| Entropie | entropy |
| Utopie | utopia |
| Hortensie | hydrangea |
| Orthoklas | orthoclase |
| Portmonee | wallet |
| vortonig | pretonic |
| Anorthosit | anorthosite |