intersex vs bisexual person

intersex and bisexual person both are nouns.

Word	Noun	Adjective	Verb	Adverb
intersex	Yes	No	No	No
bisexual person	Yes	No	No	No

As nouns, bisexual person is a hypernym of intersex; that is, bisexual person is a word with a broader meaning than intersex:

intersex: one having both male and female sexual characteristics and organs; at birth an unambiguous assignment of male or female cannot be made
bisexual person: a person who is sexually attracted to both sexes

Other hypernyms of intersex include bisexual.

intersex (noun)	bisexual person (noun)
one having both male and female sexual characteristics and organs; at birth an unambiguous assignment of male or female cannot be made	a person who is sexually attracted to both sexes