bisexuality vs sexual practice

bisexuality and sexual practice both are nouns.

Word	Noun	Adjective	Verb	Adverb
bisexuality	Yes	No	No	No
sexual practice	Yes	No	No	No

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

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

bisexuality (noun)	sexual practice (noun)
sexual activity with both men and women	activities associated with sexual intercourse
showing characteristics of both sexes