| Injektion | injection shot |
| Infektion | infection |
| injektiv | injective |
| Bijektion | bijection |
| Dejektion | dejecta |
| infektiös | infectious |
| Inspektion | inspection |
| Induktion | induction electromagnetic induction mathematical induction |
| Inunktion | embrocation unction |
| Ingestion | ingestion |
| Invention | invention |
| Intention | intention |
| Interjektion | interjection |
| Introjektion | introjection |
| Projektion | projection |
| Surjektion | surjection |
| Dissektion | dissection |
| Advektion | advection |
| Direktion | administration department |
| Elektion | election |