autoerotism vs sexual practice

autoerotism and sexual practice both are nouns.

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

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

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

autoerotism (noun)	sexual practice (noun)
using your own body as a sexual object	activities associated with sexual intercourse