gayness vs sexual practice

gayness and sexual practice both are nouns.

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

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

gayness: a sexual attraction to (or sexual relations with) persons of the same sex
sexual practice: activities associated with sexual intercourse

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

gayness (noun)	sexual practice (noun)
a sexual attraction to (or sexual relations with) persons of the same sex	activities associated with sexual intercourse