lukewarmness vs frigidity

lukewarmness and frigidity both are nouns.

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

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

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

lukewarmness (noun)	frigidity (noun)
a warmness resembling the temperature of the skin	a lack of affection or enthusiasm
lack of passion, force or animation	sexual unresponsiveness (especially of women) and inability to achieve orgasm during intercourse
	the absence of heat