lukewarmness vs warmth

lukewarmness and warmth both are nouns.

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

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

Other hypernyms of lukewarmness include warmness.

lukewarmness (noun)	warmth (noun)
a warmness resembling the temperature of the skin	a quality proceeding from feelings of affection or love
lack of passion, force or animation	the quality of having a moderate degree of heat
	the trait of being intensely emotional
	the sensation caused by heat energy
	a warmhearted feeling