hotness vs incalescence

hotness and incalescence both are nouns.

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

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

Other hyponyms of hotness include calefaction, fieriness, red heat, torridity, warmness, warmth, white heat.

hotness (noun)	incalescence (noun)
the presence of heat	the property of being warming
a hot spiciness
a state of sexual arousal