| water softener | Wasserenthärter |
| water softening | Wasserenthärtung |
| water softening installation | Wasserenthärter |
| water softening plant | Wasserenthärter |
| water softening unit | Wasserenthärter |
| water soldier | Krebsschere |
| water solubility | Wasserlöslichkeit |
| water soluble | wasserlöslich |
| water solution | wässrige Lösung |
| water spangle family | Schwimmfarngewächse |
| water spangles | Kleiner Schwimmfarn |
| water spearwort | Zungen-Hahnenfuß |
| water speedwell | Blauer Wasser-Ehrenpreis |
| water spider | Wasserspinne |
| water spinach | Wasserspinat |
| water splitting | Wasserspaltung |
| water sports | Wassersport |
| water sports club | Wassersportclub |
| water sports enthusiast | Wassersportler |
| water spot | Wasserfleck |
| water spots | Wasserflecken |
| water spotting | Wasserflecken |
| Water spout | Taifun |
| water spouts | Tromben |
| water spray | Wassereinspritzung |
| water sprite | Wassermann |
| Water stagnation | Wasser |
| water stain | Wasserfleck |
| water stains | Wasserflecken |
| water stick insect | Stabwanze |
| water still | Wasserdestillationsanlage |
| water stone | Wasserstein |
| water stones | Wassersteine |
| water storage | Wasserspeicher |
| water storage basin | Staubecken |
| water storage basins | Staubecken |
| water storage capacity | Wasserspeicherkapazität |
| water storage pool | Abklingbecken |
| water storage pools | Abklingbecken |
| water strainer | Wasserabscheider |
| water strider | Wasserläufer |
| water string | wassersperrende Rohrtour |
| water supplies | Wasserhaushalte |
| water supply | Wasserversorgung |
| water supply infrastructure | Wasserversorgungsinfrastruktur |
| Water supply line | Trinkwasser |
| water supply main | Wasserleitung |
| water supply system | Wasserversorgungssystem |
| water supply systems | Wasserversorgungsysteme |
| water surface | Wasseroberfläche |
| water surface curve | Wasserspiegellinie |
| water surface slope | Wasserspiegelgefälle |
| water suspension | wässrige Suspension |
| water sweet potato | Wasserspinat |
| water syringe | Wasserspritze |
| water syringes | Wasserspritzen |
| water system | Wassersystem |
| water table | Wasserspiegel |
| water table depth | Grundwasserspiegel |
| water table drawdown | Absenkung des Grundwasserspiegels |
| water table fluctuation | Schwankung des Wasserspiegels |
| water tables | Grundwasserstände |
| water tank | Wasserspeicher |
| water tank level indicator | Wassertankanzeige |
| water tanker | Wassertanker |
| water tanks | Wasserbehälter |
| water tap | Wasserhahn |
| water taps | Wasserhähne |
| water technology | Wassertechnik |
| water temperature | Wassertemperatur |
| water temperature gauge | Kühlwasser-Fernthermometer |
| Water tender | Tanklöschfahrzeug |
| water tenders | Tanklöschfahrzeuge |
| water the lawn | den Rasen sprengen |
| water the plants | Blumen gießen |
| water torch | Wasserstrahlschneidgerät |
| water torch cutting | Wasserstrahlschneiden |
| water torture | Wasserfolter |
| water tourism | Wassertourismus |
| water tower | Wasserturm |
| Water trap | Heber |
| water traps | Wasserabscheider |
| water treader | Hüftwasserläufer |
| water treatment | Wasseraufbereitung |
| water treatment facilities | Abwasserkläranlagen |
| water treatment facility | Abwasserkläranlage |
| water treatment plant | Wasseraufbereitungsanlage |
| water treatment plants | Wasseraufbereitungsanlagen |
| water trough | Trog |
| water trumpets | Wasserkelche |
| water tube | Wasserschlauch |
| water tube boiler | Wasserrohrkessel |
| water tubes | Siederohre |
| water turbine | Wasserturbine |
| water turtle | Wasserschildkröte |
| water under the bridge | Schnee von gestern sein |
| water uptake | Wasseraufnahme |
| water use | Wassernutzung |
| Water Use Act | Wasserrechtsgesetz |
| water use law | Wasserrecht |
| water utilities | Wasserwerke |
| water utility | Wasserwerke |
| water utility companies | Wasserversorgungsbetriebe |
| water utility company | Wasserversorgungsbetrieb |
| water vacuum cleaner | Wasserstaubsauger |
| water vapor | Dampf |
| water vapor dew point | Wasserdampftaupunkt |
| water vapor pressure | Wasserdampfdruck |
| water vapor radiometer | Wasserdampfradiometer |
| water vapor retarder | Wasserdampfbremse |
| water vapour | Wasserdampf |
| water vapour content | Wasserdampfgehalt |
| water vapour dew point | Wasserdampftaupunkt |
| water vapour pressure | Wasserdampfdruck |
| water vapour retarder | Wasserdampfbremse |
| water vapour uptake | Wasserdampfaufnahme |
| water varnish | Wasserlack |
| water veins | Wasseradern |
| water velvet | Carolina-Algenfarn |
| water violet | Wasserfeder |
| water vole | Wasserratte |
| water volume | Wasservolumen |
| water vortex | Wasserwirbel |
| Water wave | Wasserwelle |
| water welder | Sauerstoff-Wasserstoff-Mikroschweißgerät |
| water well | Wasserbrunnen |
| water wells | Wasserbohrungen |
| water wheel | Wasserrad |
| water whorlgrass | Europäisches Quellgras |
| water wing | Schwimmflügel |
| water wings | Schwimmflügel |
| Water Winter Wonderland | Wasser-Winter-Wunderland |
| water wistaria | Wasser-Wistarie |
| water witch | Rutengänger |
| water witches | Wünschelrutengängerinnen |
| water with ice | Eiswasser |
| water withdrawal | Wasserentnahme |
| water works | Wasserwerk |
| Water year | Hydrologisches Jahr |
| water) | Wasser) |
| water-absorbing | wasseranziehend |
