| Orthese | orthosis orthotic |
| Prothese | prosthesis denture |
| These | thesis |
| ortsfest | sessile |
| Orthoepie | orthoepy |
| Worthülse | catchword empty phrase empty word shell |
| orten | locate |
| ortho- | ortho- |
| Arthrose | osteoarthritis arthrosis osteoartrit |
| Theme | theme |
| Athene | Athena |
| Diathese | voice diathesis |
| Kathete | cathetus |
| Osthessen | East Hesse |
| Synthese | synthesis |
| Theke | counter |
| Themse | Thames |
| Ästhesie | sensibility |
| Orchester | orchestra |
| Friese | Frisian |