frigidity vs unemotionality

frigidity and unemotionality both are nouns.

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

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

Other hypernyms of frigidity include emotionlessness.

frigidity (noun)	unemotionality (noun)
a lack of affection or enthusiasm	absence of emotion
sexual unresponsiveness (especially of women) and inability to achieve orgasm during intercourse	apathy demonstrated by an absence of emotional reactions
the absence of heat