hotness vs spiciness

hotness and spiciness both are nouns.

Word	Noun	Adjective	Verb	Adverb
hotness	Yes	No	No	No
spiciness	Yes	No	No	No

As nouns, spiciness is a hypernym of hotness; that is, spiciness is a word with a broader meaning than hotness:

Other hypernyms of hotness include spice, spicery.

hotness (noun)	spiciness (noun)
the presence of heat	the property of being seasoned with spice and so highly flavored
a hot spiciness	behavior or language bordering on indelicacy
a state of sexual arousal