| Hydrologe | hydrologist |
| Hydrologie | hydrology |
| Hydrologin | hydrologist |
| Hydrolyse | hydrolysis |
| Androloge | andrologist |
| Hydrogen | hydrogen |
| Andrologie | andrology |
| Horologie | horology |
| Astrologe | astrologer astrologist |
| Neurologe | neurologist |
| Urologe | urologist |
| Histologe | histologist |
| Podologe | podiatrist |
| Radiologe | radiologist |
| Hymnologie | hymnology |
| Ideologe | ideologist |
| Mykologe | mycologist |
| Mythologe | mythologist mythologer |
| Physiologe | physiologist |
| Hydroenergie | hydropower |