chill vs coldness

chill and coldness both are nouns.

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

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

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

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