sultriness vs desirability

sultriness and desirability both are nouns.

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

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

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

sultriness (noun)	desirability (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