frostiness vs whiteness

frostiness and whiteness both are nouns.

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

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

frostiness: a silvery-white color
whiteness: the quality or state of the achromatic color of greatest lightness (bearing the least resemblance to black)

Other hypernyms of frostiness include white.

frostiness (noun)	whiteness (noun)
coldness as evidenced by frost	the quality or state of the achromatic color of greatest lightness (bearing the least resemblance to black)
a silvery-white color	lightness or fairness of complexion
	the state of being unsullied by sin or moral wrong; lacking a knowledge of evil