frostiness vs coldness

frostiness and coldness both are nouns.

Word	Noun	Adjective	Verb	Adverb
frostiness	Yes	No	No	No
coldness	Yes	No	No	No

As nouns, coldness is a hypernym of frostiness; that is, coldness is a word with a broader meaning than frostiness:

Other hypernyms of frostiness include cold, frigidity, frigidness, low temperature.

frostiness (noun)	coldness (noun)
coldness as evidenced by frost	the absence of heat
a silvery-white color	a lack of affection or enthusiasm
	the sensation produced by low temperatures