freezing vs frost

freezing and frost both are nouns.

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

As nouns, frost is a hyponym of freezing; that is, frost 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
frost: the formation of frost or ice on a surface

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

freezing (noun)	frost (noun)
the withdrawal of heat to change something from a liquid to a solid	weather cold enough to cause freezing
	the formation of frost or ice on a surface
	ice crystals forming a white deposit (especially on objects outside)

freezing (verb)	frost (verb)
	damage by frost
	decorate with frosting
	provide with a rough or speckled surface or appearance
	cover with frost