shake up vs fright

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

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

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

shake up (noun)	fright (noun)
	an emotion experienced in anticipation of some specific pain or danger (usually accompanied by a desire to flee or fight)

shake up (verb)	fright (verb)
make fuller by shaking	cause fear in
change the arrangement or position of
stir the feelings, emotions, or peace of
shock physically
shake; especially (a patient to detect fluids or air in the body)
organize anew