| Imitator | imitator aper |
| Imitatorin | impersonator |
| Imitat | fake |
| Imitation | imitation |
| Mitautor | coauthor |
| Agitator | agitator |
| Initiator | initiator |
| Mittäter | accomplice |
| Diktator | dictator |
| Animator | animator |
| Imperator | emperor |
| Iterator | iterator |
| Dominator | dominator |
| Emulator | emulator |
| Indikator | indicator |
| Ionisator | ioniser ionizer |
| Isolator | insulator |
| Nominator | singular term |
| Simulator | simulator |
| Scimitar | scimitar |