| isentrop | isentropic |
| isotrop | isotropic |
| isenthalp | isenthalpic isoenthalpic |
| intro | intro |
| Intro | intro introduction launch opening |
| Intron | intron |
| intro- | intro- |
| Azeotrop | azeotrope |
| azeotrop | azeotropic |
| ionotrop | ionotropic |
| Misanthrop | misanthrope |
| Eisente | long-tailed duck |
| Eisenatom | iron atom |
| Eisenerz | iron ore |
| Wisent | wisent European bison |
| Senklot | plummet |
| Senator | senator |
| Senföl | mustard oil |
| Senior | senior citizen |
| senior | senior |