| Hydronymie | hydronymy |
| Hydronym | hydronym |
| Hyperonymie | hypernymy |
| Hyponymie | hyponymy |
| Hydrochemie | hydrochemistry |
| Hydroenergie | hydropower |
| Hydrologie | hydrology |
| Hydrolyse | hydrolysis |
| Meronymie | meronymy |
| Homonymie | homonymy |
| Synonymie | synonymy |
| Hydrodynamik | hydrodynamics |
| Hydrologin | hydrologist |
| Hydroxyl | hydroxyl |
| Hydrochorie | hydrochory |
| Hydrologe | hydrologist |
| Hydroxid | hydroxide |
| hydrophil | hydrophilic |
| Androgynie | androgyne |
| Heteronomie | heteronomy |