| Oxygenation | oxygenation |
| Oxydation | oxidation |
| Oxygenium | oxygen |
| oxygenieren | oxygenate |
| Imagination | imagination |
| Obstination | obstinacy obstination |
| Ordination | ordination |
| Stagnation | stagnation |
| Operation | surgery operation |
| Oxidation | oxidation |
| Vegetation | vegetation |
| Oxygen | oxygen |
| oxyton | oxytone |
| Oxygenierung | oxygenation |
| Oxytonon | oxytone |
| Regentin | regent |
| Agentin | agent |
| Degeneration | degeneration |
| Gegenion | counterion |
| Generation | generation |