| Wasserschloss | castle set on a lake moated castle surge chamber surge tank |
| Wasseranschluss | water connection |
| Wasserschlauch | bladderwort |
| Wasserhose | waterspout |
| Wasserschaden | water damage |
| Wasserscheide | watershed divide drainage divide water divide height of land water parting |
| Wasserscheu | hydrophobia |
| wasserscheu | aquaphobic hydrophobic scared of water |
| Wasserschlange | water snake Hydra |
| Wasserschwein | capybara |
| Abwasserschlamm | sludge |
| Wasserspülung | flush |
| Wassersäule | water column |
| Wasserfloh | water flea |
| Wasserglas | tumbler water glass sodium silicate |
| Wasserloch | water hole |
| Wassermelone | watermelon |
| Wassermühle | water mill |
| Wassersport | aquatics water sports |
| Wasserstoff | hydrogen |