| Orthognathie | orthognathy orthognathysm |
| Orthographie | orthography spelling |
| orthognath | orthognathic orthognathous |
| Orthografie | orthography spelling |
| Prognathie | prognathism prognathia prognathy |
| Orthopädie | orthopaedics orthoorthopedicsaedics |
| Arthropathie | arthropathy |
| Lithographie | lithography lithograph |
| Optographie | optography |
| Orographie | orography |
| Orthodoxie | Orthodoxy |
| Orthonitrat | orthonitrate |
| Orthorexie | orthorexia |
| orthographisch | orthographic |
| Orthoepie | orthoepy |
| Orthopäde | orthopedist orthopaedist orthopaedic specialist orthopedic specialist orthopedic surgeon |
| Orthopädin | orthopaedic specialist orthopaedist orthopedic specialist orthopedist |
| orthogonal | orthogonal |
| Lithografie | lithograph |
| Litholatrie | litholatry |