stir vs masturbate

stir is a noun but masturbate is not a noun.

Word	Noun	Adjective	Verb	Adverb
stir	Yes	No	Yes	No
masturbate	No	No	Yes	No

As verbs, masturbate is a hyponym of stir; that is, masturbate is a word with a more specific, narrower meaning than stir:

stir (noun)	masturbate (noun)
a rapid active commotion
emotional agitation and excitement
a prominent or sensational but short-lived news event

stir (verb)	masturbate (verb)
mix or add by stirring	get sexual gratification through self-stimulation
summon into action or bring into existence, often as if by magic	stimulate sexually
affect emotionally
stir the feelings, emotions, or peace of
move very slightly
move an implement through
to begin moving
stir feelings in