coldness vs chill

coldness and chill both are nouns.

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

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

Other hyponyms of coldness include gelidity, iciness, chilliness, coolness, nip, frostiness, cool.

coldness (noun)	chill (noun)
the absence of heat	coldness due to a cold environment
a lack of affection or enthusiasm	a sudden numbing dread
the sensation produced by low temperatures	an almost pleasurable sensation of fright
	a sensation of cold that often marks the start of an infection and the development of a fever