self-gratification vs sexual activity

self-gratification and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-gratification	Yes	No	No	No
sexual activity	Yes	No	No	No

self-gratification (noun)	sexual activity (noun)
the act of satisfying your own desires and giving yourself pleasure	activities associated with sexual intercourse
indiscipline with regard to sensuous pleasures