| Interjektion | interjection |
| Interaktion | interaction |
| Interception | interception |
| Intervention | intervention |
| Introjektion | introjection |
| Untersektion | subsection |
| Interpunktion | punctuation |
| Interruption | interruption |
| Injektion | injection shot |
| Imperfektion | imperfection |
| Insurrektion | insurrection |
| Interaktom | interactome |
| Interferon | interferon |
| Internistin | internist |
| Interpellation | interpellation |
| Interpretin | performer |
| Interruptio | abortive |
| Intinktion | intinction |
| interventiv | interventive intervention |
| Integration | integration |