icing vs frosting

icing and frosting both are nouns.

Word	Noun	Adjective	Verb	Adverb
icing	Yes	No	No	No
frosting	Yes	No	No	No

As nouns, icing and frosting are synonyms defined as:

icing and frosting: a flavored sugar topping used to coat and decorate cakes

Other synonyms of icing include ice.

icing (noun)	frosting (noun)
(ice hockey) the act of shooting the puck from within your own defensive area the length of the rink beyond the opponent's goal	a flavored sugar topping used to coat and decorate cakes
a flavored sugar topping used to coat and decorate cakes
the formation of frost or ice on a surface