Salt water is more buoyant than fresh water.

Sponge absorbs water so it is convenient for shading water-colours and such.

I use a water filter to purify my drinking water.

When he said "water," she gave him water.

Your tap water is too hard. Get a water softener.

Ice melts into water.

Oil will float on water.

Wood floats in water.

Cotton absorbs water.

They camped at the water's edge.