| Koleopterologe | coleopterologist |
| Koleopterologie | coleopterology |
| Lepidopterologe | lepidopterist |
| Kollaterale | collateral |
| Coleopterophilie | cantharophily |
| Lepidopterologie | lepidopterology lepidoptery |
| Kroprologie | scatology |
| Oneirologe | oneirologist |
| Meteorologe | meteorologist |
| Nephrologe | nephrologist |
| Klimatologe | climatologist |
| Kosmetologe | cosmetologist |
| Herpetologe | herpetologist |
| Kryptologe | cryptologist |
| Osteologe | osteologist |
| Paläontologe | paleontologist |
| Politologe | political scientist |
| Kolektomie | colectomy |
| Lexikologe | lexicologist |
| kollateral | collateral |