self-abuse vs self-stimulation

self-abuse and self-stimulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-abuse	Yes	No	No	No
self-stimulation	Yes	No	No	No

As nouns, self-abuse and self-stimulation are synonyms defined as:

self-abuse and self-stimulation: manual stimulation of your own genital organ for sexual pleasure

self-abuse (noun)	self-stimulation (noun)
manual stimulation of your own genital organ for sexual pleasure	manual stimulation of your own genital organ for sexual pleasure