lukewarmness vs coldness

lukewarmness and coldness both are nouns.

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

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

Other hypernyms of lukewarmness include chilliness, coolness, frigidity, frigidness, iciness.

lukewarmness (noun)	coldness (noun)
a warmness resembling the temperature of the skin	the absence of heat
lack of passion, force or animation	a lack of affection or enthusiasm
	the sensation produced by low temperatures