| Hydra | Hydra Lernaean Hydra |
| Hydrat | hydrate |
| Hydrant | hydrant fire hydrant fireplug |
| Hydraulik | hydraulics hydraulic system |
| hydro- | hydro- |
| Hydrid | hydride |
| Mudra | mudra |
| Hydrathülle | hydration shell |
| Hydrauliköl | hydraulic oil |
| hydraulisch | hydraulic |
| Exedra | exedra |
| Madras | Madras |
| Sandra | Sandra |
| Dram | dram |
| Drau | Drava |
| Tundra | tundra |
| dran | get it get what's coming to one |
| Enhydros | enhydros |
| Hydrogen | hydrogen |
| Hydroxyl | hydroxyl |