| Rotation | rotation |
| Dotation | endowment |
| Notation | musical notation |
| Votation | voting |
| Mutation | mutation |
| Nutation | nutation |
| Station | station ward |
| Novation | novation |
| Oration | collect |
| Ovation | ovation |
| Ration | ration |
| Relation | relation |
| Protektion | patronage |
| Rotarier | Rotarian |
| Rotationskurve | rotation curve |
| rotten | ret |
| Erdrotation | earth's rotation |
| Rotationsachse | axis of rotation |
| Rotstift | red pencil |
| Rotwein | red wine |