shake up vs stir up

shake up and stir up both are verbs.

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

As verbs, shake up and stir up are synonyms defined as:

Other synonyms of shake up include agitate, commove, disturb, raise up, vex.

shake up (verb)	stir up (verb)
make fuller by shaking	provoke or stir up
change the arrangement or position of	change the arrangement or position of
stir the feelings, emotions, or peace of	arouse or excite feelings and passions
shock physically	try to stir up public opinion
shake; especially (a patient to detect fluids or air in the body)
organize anew