| Intuition | intuition |
| Intention | intention |
| Intubation | intubation |
| intuitiv | intuitive |
| Induktion | induction electromagnetic induction mathematical induction |
| Intinktion | intinction |
| Intrusion | intrusion |
| Intension | tenseness |
| Intonation | intonation |
| Initiation | initiation |
| Attrition | attrition |
| Inquisition | inquisition Inquisition |
| Nutrition | nutrition |
| Petition | petition |
| Ingestion | ingestion |
| Inhumation | inhumation |
| Inkubation | incubation |
| Invention | invention |
| Infektion | infection |
| Inflation | inflation |