| Insigne | insigne |
| Insignien | regalia |
| Insasse | passenger resident patient inmate |
| Insider | insider |
| Insomnie | insomnia |
| Instanz | instantiate |
| instant | instant |
| Ansinnen | request |
| Unsinn | nonsense |
| ISIG | ISIS |
| Design | design |
| Designer | designer |
| designen | design |
| aneignen | appropriate |
| benigne | benign |
| maligne | malignant |
| Lasagne | lasagna |
| Einsimmen | Issime |
| Feinsinn | subtlety |
| Ginseng | ginseng |