| water lily | Seerose |
| water lily midge | Seerosen-Zuckmücke |
| water lily pool | Seerosenbecken |
| water line | Wasserlinie |
| water load | Wasserbeladung |
| water loading | Wasserbeladung |
| water lode | Wasserlauf |
| water loss | Wasserverlust |
| water main | Hauptwasserleitung |
| water main connection | Wasseranschluss |
| water management | Wasserwirtschaft |
| water management ... | wasserwirtschaftliche ... |
| Water Management Act | Wasserhaushaltsgesetz |
| water management office | Wasserwirtschaftsamt |
| water mandlin | Wasserdost |
| water maple | Rot-Ahorn |
| Water Margin | Die Räuber vom Liang-Schan-Moor |
| water mark | Wasserzeichen |
| water marking | Wasserränder |
| water marks | Wasserstandsmarken |
| water mattress | Wassermatratze |
| water maze | Wasserlabyrinth |
| water measurer | Wasserläufer |
| water measuring point | Wassermessstelle |
| water measuring tank | Wassermessgefäß |
| water melon | Wassermelone |
| water metabolism | Wasserhaushalt |
| water meter | Wasseruhr |
| water meter-reader | Wassermann |
| water metering | Wassermessung |
| water meters | Wasserzähler |
| water milfoil | Tausendblatt |
| water mill | Wassermühle |
| water mimosas | Wassermimosen |
| water mist | Wassernebel |
| water mist application | Wassernebeleinsatz |
| water mist extinguisher | Wassernebellöscher |
| water mist fire extinguisher | Wassernebel-Feuerlöscher |
| water moccasin | Wassermokassinschlange |
| water molecule | Wassermolekül |
| water mongoose | Wassermanguste |
| water monitor | Wasserwerfer |
| water monitoring | Wasserüberwachung |
| water morning glory | Wasserspinat |
| water museum | Wassermuseum |
| Water Music | Wassermusik |
| water noodle | Wassernudel |
| water nozzle | Wasserdüse |
| water nymph | Wassernymphe |
| water nymphs | Wassernymphen |
| water of constitution | Kristallisationswasser |
| water of crystallisation | chemisch gebundenes Kristallwasser |
| water of crystallization | Kristallwasser |
| water of hydration | Kristallwasser |
| water of imbibition | Bergfeuchte |
| Water on the brain | Hydrocephalus |
| water onion | Thailand-Wasserlilie |
| water opal | Halit |
| Water Opossum | Schwimmbeutler |
| Water organ | Hydraulis |
| water outlet | Wasserablass |
| water outlet connection | Kühlwasserauslaufstutzen |
| water outlet connections | Kühlwasserauslaufstutzen |
| water ouzel | Wasseramsel |
| water ox | Wasserbüffel |
| water oxygen | gelöster Sauerstoff |
| Water paint | Aquarell |
| water pan | Wasserkasten |
| water parameters | Wasserwerte |
| water park | Freizeitbad |
| water parks | Erlebnisbäder |
| water parsnips | Berlen |
| water parting | Wasserscheide |
| water passage | Wasserkanal |
| water pathway | Wasserpfad |
| water patrol duty | Wasserstreifendienst |
| water penetration | Wassereinbruch |
| water pennyworts | Wassernabel |
| water pepper | Wasserpfeffer |
| water permeability | Wasserdurchlässigkeit |
| water permeability measurement | Wasserdurchlässigkeitsmessung |
