sultriness vs desirableness

sultriness and desirableness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sultriness	Yes	No	No	No
desirableness	Yes	No	No	No

As nouns, desirableness is a hypernym of sultriness; that is, desirableness is a word with a broader meaning than sultriness:

Other hypernyms of sultriness include desirability, oomph, sex appeal.

sultriness (noun)	desirableness (noun)
the quality of expressing or arousing sexual desire	the quality of being worthy of desiring
oppressively hot and humid weather	attractiveness to the opposite sex