| Kolposkop | colposcope |
| Koloskop | colonoscope |
| Koloskopie | colonoscopy |
| Horoskop | horoscope |
| Otoskop | otoscope |
| Kolophon | colophon |
| Kollision | collision |
| Kollusion | collusion |
| Koloss | colossus |
| Kolosser | Colossian Colossians |
| kolossal | colossal huge |
| Kompost | compost |
| Endoskop | endoscope |
| Rektoskop | rectoscope |
| hygroskop | hygroscopic |
| Demoskop | pollster public opinion researcher |
| Gyroskop | gyroscope |
| Kaleidoskop | kaleidoscope |
| Mikroskop | microscope |
| Mutoskop | mutoscope |