A boat that operates like a bus, as a means of public transport.

(aviation) An aircraft used for firefighting by dropping large quantities of water on a fire.

(idiomatic) In a competitive situation, the exhibition of apparent weakness or vulnerability by one party, especially when this leads to a feeling of vulnerability or greater pressure to perform on the part of the weak party, and/or enhanced expectation of victory by the other(s).

plural of water boy

A retriever type of gun dog bred to flush and retrieve game from water.

Tropical duckweed, water lettuce (Pistia stratiotes).

plural of water spider

plural of water-repellent

The open ocean; deep seas.

plural of water vapor