shake up vs scramble

shake up is not a noun while scramble is a noun.

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

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

Other hyponyms of shake up include beat, toss, rile, roil, poke.

shake up (noun)	scramble (noun)
	rushing about hastily in an undignified way
	an unceremonious and disorganized struggle

shake up (verb)	scramble (verb)
make fuller by shaking	make unintelligible
change the arrangement or position of	bring into random order
stir the feelings, emotions, or peace of	stir vigorously
shock physically	to move hurriedly
shake; especially (a patient to detect fluids or air in the body)	climb awkwardly, as if by scrambling
organize anew