| Insinuation | insinuation |
| Institution | fixture institution |
| Insemination | insemination |
| Inspiration | inspiration |
| Inundation | flood |
| Situation | situation |
| Infixation | infixation |
| Initiation | initiation |
| Indikation | indication |
| Intonation | intonation |
| Intinktion | intinction |
| Inspektion | inspection |
| Installation | installation installation art |
| insinuieren | insinuate |
| Inunktion | embrocation unction |
| Attenuation | attenuation |
| Menstruation | menstruation |
| Dissipation | dissipation |
| Gemination | gemination |
| Infestation | infestation |