bisexuality vs sex

bisexuality and sex both are nouns.

Word	Noun	Adjective	Verb	Adverb
bisexuality	Yes	No	No	No
sex	Yes	No	Yes	No

As nouns, sex is a hypernym of bisexuality; that is, sex is a word with a broader meaning than bisexuality:

Other hypernyms of bisexuality include sex activity, sexual activity, sexual practice.

As nouns, sex is a hypernym of bisexuality; that is, sex is a word with a broader meaning than bisexuality:

bisexuality: showing characteristics of both sexes
sex: the properties that distinguish organisms on the basis of their reproductive roles

Other hypernyms of bisexuality include gender, sexuality.

bisexuality (noun)	sex (noun)
sexual activity with both men and women	activities associated with sexual intercourse
showing characteristics of both sexes	the properties that distinguish organisms on the basis of their reproductive roles
	all of the feelings resulting from the urge to gratify sexual impulses
	either of the two categories (male or female) into which most organisms are divided

bisexuality (verb)	sex (verb)
	tell the sex (of young chickens)
	to evoke sexual feelings