stir vs stir up

stir is a noun but stir up is not a noun.

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

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

stir (verb)	stir up (verb)
mix or add by stirring	provoke or stir up
summon into action or bring into existence, often as if by magic	change the arrangement or position of
affect emotionally	arouse or excite feelings and passions
stir the feelings, emotions, or peace of	try to stir up public opinion
move very slightly
move an implement through
to begin moving
stir feelings in