| Abwassersystem | sewage system sewerage wastewater system |
| Abgassystem | exhaust gas system exhaust system |
| Abwasserfahne | plume |
| Abwasserschlamm | sludge |
| Sechsersystem | senary |
| Zweiersystem | binary numeral system |
| Waffensystem | weapon systems |
| Abwasser | wastewater waste water |
| Abwasserkanal | sewage sewage system sewer |
| Abwasserleitung | drain sewerage |
| Abwassertank | cesspit cesspool septic tank |
| Wasserhärte | water hardness |
| Wassersäule | water column |
| Wassertreter | phalarope |
| Bewässerungssystem | irrigation system |
| Wasseramsel | dipper |
| Wasserhose | waterspout |
| Wasserkessel | kettle |
| Wasserratte | water vole |
| Wasserscheu | hydrophobia |
| wasserscheu | aquaphobic hydrophobic scared of water |