chilliness vs frigidness

chilliness and frigidness both are nouns.

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

As nouns, frigidness is a hypernym of chilliness; that is, frigidness is a word with a broader meaning than chilliness:

Other hypernyms of chilliness include cold, coldness, frigidity, low temperature.

As nouns, chilliness and frigidness are synonyms defined as:

Other synonyms of chilliness include coldness, coolness, frigidity, iciness.

chilliness (noun)	frigidness (noun)
the property of being moderately cold	a lack of affection or enthusiasm
a lack of affection or enthusiasm	sexual unresponsiveness (especially of women) and inability to achieve orgasm during intercourse
	the absence of heat