| Hydrochorie | hydrochory |
| Hydrochemie | hydrochemistry |
| Hydrologie | hydrology |
| Hemerochorie | hemerochory |
| Hydrochinon | hydroquinone |
| Hydroenergie | hydropower |
| Hydrologin | hydrologist |
| Hydrosphäre | hydrosphere |
| Hydrologe | hydrologist |
| Hydronymie | hydronymy |
| Hydrotherapie | hydrotherapy |
| hydrophil | hydrophilic |
| hydrophob | hydrophobic |
| Androphobie | androphobia |
| Anemochorie | anemochory |
| Hypochondrie | hypochondria hypochondriasis |
| Zoochorie | zoochory |
| Hydrocortison | hydrocortisone |
| Hydrogenase | hydrogenase |
| Hydrogeochemie | hydrogeochemistry |