carnal abuse vs sexual practice

carnal abuse and sexual practice both are nouns.

Word	Noun	Adjective	Verb	Adverb
carnal abuse	Yes	No	No	No
sexual practice	Yes	No	No	No

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

carnal abuse: any lascivious contact by an adult with the sexual organs of a child (especially not involving sexual intercourse)
sexual practice: activities associated with sexual intercourse

Other hypernyms of carnal abuse include sex, sex activity, sexual activity.

carnal abuse (noun)	sexual practice (noun)
sexual intercourse with a person (girl or boy) who has not reached the age of consent (even if both parties participate willingly)	activities associated with sexual intercourse
any lascivious contact by an adult with the sexual organs of a child (especially not involving sexual intercourse)