shake up vs pick up

shake up and pick up both are verbs.

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

As verbs, pick up is a hyponym of shake up; that is, pick up is a word with a more specific, narrower meaning than shake up:

shake up (verb)	pick up (verb)
make fuller by shaking	gain or regain energy
change the arrangement or position of	improve significantly; go from bad to good
stir the feelings, emotions, or peace of	lift out or reflect from a background
shock physically	get to know or become aware of, usually accidentally
shake; especially (a patient to detect fluids or air in the body)	eat by pecking at, like a bird
organize anew	take into custody
	take up by hand
	fill with high spirits; fill with optimism
	give a passenger or a hitchhiker a lift
	take and lift upward
	perceive with the senses quickly, suddenly, or momentarily
	register (perceptual input)
	buy casually or spontaneously
	gather or collect
	get in addition, as an increase
	meet someone for sexual purposes