Tropical duckweed, water lettuce (Pistia stratiotes).

Alternative form of pocket watch

Alternative form of backwater; the water held back by a dam or other obstruction

Alternative spelling of semi-heavy water

(chemistry) DHO, a heavier form of water, containing a protium and a deuterium type of hydrogen atoms.

(idiomatic) An indication that a development will follow.

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

That allows water to permeate through its structure

Alternative spelling of waterhole

plural of water table