| Warmwasserboiler | water heater |
| Warmwasserbereiter | water heater |
| Warmwasserspeicher | hot water heater |
| Warmwasser | hot water |
| Waldwasserläufer | green sandpiper |
| Wasserbomber | water bomber waterbomber |
| Wasserbombe | depth charge hedgehog water balloon water bomb |
| Wassereimer | water bucket |
| Wasserkocher | electric kettle water boiler electric water jug teakettle |
| Wasserzähler | water meter |
| Weihwasserbecken | stoup holy-water font |
| Wärmebild | thermogram |
| Wärmeenergie | heat |
| Wärmezähler | heat meter |
| Abwasserfahne | plume |
| Grundwasserleiter | aquifer |
| Terekwasserläufer | Terek sandpiper |
| Wasserbär | water bear |
| Wassernixe | mermaid |
| Wasserpocken | water pox |