| Proktologin | proctologist |
| Proktologe | proctologist |
| Protologie | protology |
| Oktologie | octology |
| Erotologie | erotology |
| Ontologin | ontologist |
| Politologin | political scientist |
| Phonologin | phonologist |
| Podologin | podiatrist |
| Pomologin | pomologist |
| Ökologin | ecologist |
| Kroprologie | scatology |
| Protozoon | protozoan |
| Addiktologin | addictologist |
| Planktologie | planktology |
| Aretologie | aretology |
| Bromatologie | bromatology |
| Herpetologin | herpetologist |
| Histologin | histologist |
| Knastologin | jailbird |