freezing vs icing

freezing and icing both are nouns.

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

As nouns, icing is a hyponym of freezing; that is, icing is a word with a more specific, narrower meaning than freezing:

freezing: the withdrawal of heat to change something from a liquid to a solid
icing: the formation of frost or ice on a surface

Other hyponyms of freezing include freeze-drying, lyophilisation, lyophilization, frost.

freezing (noun)	icing (noun)
the withdrawal of heat to change something from a liquid to a solid	(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
	the formation of frost or ice on a surface