frigidity vs frostiness

frigidity and frostiness both are nouns.

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

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

Other hyponyms of frigidity include chill, gelidity, iciness, chilliness, coolness, nip, cool.

frigidity (noun)	frostiness (noun)
a lack of affection or enthusiasm	coldness as evidenced by frost
sexual unresponsiveness (especially of women) and inability to achieve orgasm during intercourse	a silvery-white color
the absence of heat