frigidness vs tepidness

frigidness and tepidness both are nouns.

Word	Noun	Adjective	Verb	Adverb
frigidness	Yes	No	No	No
tepidness	Yes	No	No	No

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

Other hyponyms of frigidness include stone, lukewarmness.

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