| Hydrochemie | hydrochemistry |
| Hydrochorie | hydrochory |
| Hydrogeochemie | hydrogeochemistry |
| Hydronymie | hydronymy |
| Agrochemie | agrochemistry |
| Petrochemie | petrochemistry |
| Radiochemie | radiochemistry |
| Hydrochinon | hydroquinone |
| Hydroenergie | hydropower |
| Hydrologie | hydrology |
| Hydrotherapie | hydrotherapy |
| hydrophil | hydrophilic |
| Femtochemie | femtochemistry |
| Geochemie | geochemistry |
| Kosmochemie | cosmochemistry |
| Oleochemie | oleochemistry |
| Stereochemie | stereochemistry |
| Thermochemie | thermochemistry |
| Biochemie | biochemistry |
| Kernchemie | nuclear chemistry |