| Asteroid | asteroid |
| Steroid | steroid |
| Asterix | Asterix |
| Astroide | astroid |
| Aster | aster |
| Asterisk | asterisk |
| Asterixis | asterixis flapping tremor |
| astrein | cool |
| astro- | astr- |
| Ostermond | April |
| Osterei | Easter egg |
| Osteria | osteria |
| steril | sterile |
| systemoid | systemoid |
| alternd | aging |
| Afterkind | bastard |
| Arterie | artery |
| Bakterioid | bacteroid |
| Toroid | toroid |
| Android | android |