promiscuity vs sexual practice

promiscuity and sexual practice both are nouns.

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

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

promiscuity: indulging in promiscuous (casual and indiscriminate) sexual relations
sexual practice: activities associated with sexual intercourse

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

promiscuity (noun)	sexual practice (noun)
indulging in promiscuous (casual and indiscriminate) sexual relations	activities associated with sexual intercourse