| Infixation | infixation |
| Inflation | inflation |
| Affixation | affixation |
| Indikation | indication |
| Infestation | infestation |
| Infektion | infection |
| Infiltration | infiltration |
| Information | information |
| Präfixation | prefixation |
| Suffixation | suffixation |
| Inhumation | inhumation |
| Initiation | initiation |
| Inkubation | incubation |
| Irritation | irritation |
| Vinifikation | winemaking |
| Animation | animation |
| Imitation | imitation |
| Inhalation | inhalation |
| Innovation | innovation |
| Insinuation | insinuation |