| Ektoderm | ectoderm |
| Oktober | October |
| Encoder | encoder |
| Köder | bait |
| ködern | attract bait |
| Oktaeder | octahedron |
| Hektor | Hector |
| Lektor | lector reader lecturer literary editor |
| Rektor | rector principal |
| Sektor | sector |
| Vektor | vector |
| ektomieren | ectomise ectomize |
| Aktor | actuator |
| Oktole | octuplet |
| Blastoderm | blastoderm |
| Optode | optode |
| Autodrom | motor-racing circuit dodgems track bumper car dodgem |
| Zytode | cytode |
| Kode | code |
| Kodein | codeine |