| Intonation | intonation |
| Intinktion | intinction |
| Intention | intention |
| Intubation | intubation |
| Detonation | detonation |
| Innovation | innovation |
| Integration | integration |
| Intension | tenseness |
| Interaktion | interaction |
| Intoxikation | intoxication |
| Intuition | intuition |
| Mikronation | micronation |
| Nunation | nunation |
| Inkarnation | incarnation |
| Annotation | annotation |
| Infixation | infixation |
| Inhumation | inhumation |
| Initiation | initiation |
| Inkubation | incubation |
| Novation | novation |