stimulation vs sexual practice

stimulation and sexual practice both are nouns.

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

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

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

stimulation (noun)	sexual practice (noun)
the act of arousing an organism to action	activities associated with sexual intercourse
mutual sexual fondling prior to sexual intercourse
any stimulating information or event; acts to arouse action
(physiology) the effect of a stimulus (on nerves or organs etc.)