de·con·ges·tant 
(dē′kən-jĕstənt)
(dē′kən-jĕstənt)n.
A medication or treatment that decreases congestion, as of the sinuses.
adj.
Capable of relieving congestion.
- water biscuit
- water blister
- water bloom
- waterboard
- water board
- waterboarding
- water boatman
- waterborne
- water-borne
- water brash
- waterbuck
- water buffalo
- water bug
- Waterbury
- waterbus
- water caltrop
- water cannon
- water chestnut
- water chinquapin
- water clock
- water closet
- water clover
- watercolor
- watercolorist
- water column