Frosting (noun)
A sugary coating for cakes and other baked goods.
Frosting (noun)
A layer of frost.
Frosting (noun)
The theft of a car while it is left unattended, especially when its engine is left running in the winter to defrost the car.
Icing (noun)
A sweet glaze made primarily of sugar and often flavored, typically used for baked goods; frosting.
Icing (noun)
A minor violation of ice hockey rules, occurring when a player shoots the puck from his/her side of the red line so that it crosses the goal line on the opponent’s side. A team playing short-handed is not penalized for this.
Icing (noun)
The process of forming a layer of ice on a surface.
Wiktionary