| Intubation | intubation |
| Inkubation | incubation |
| Intonation | intonation |
| Intuition | intuition |
| Inhumation | inhumation |
| Intinktion | intinction |
| Integration | integration |
| Intention | intention |
| Interaktion | interaction |
| Akkubation | accubation |
| Inkubator | incubator business incubator |
| Infixation | infixation |
| Initiation | initiation |
| Nunation | nunation |
| Indikation | indication |
| Inflation | inflation |
| Inhalation | inhalation |
| Innovation | innovation |
| Inundation | flood |
| Iteration | iteration |