shake-up vs reorganization

shake-up and reorganization both are nouns.

Word	Noun	Adjective	Verb	Adverb
shake-up	Yes	No	No	No
reorganization	Yes	No	No	No

As nouns, shake-up and reorganization are synonyms defined as:

shake-up and reorganization: the imposition of a new organization; organizing differently (often involving extensive and drastic changes)

Other synonyms of shake-up include reorganisation, shakeup.

shake-up (noun)	reorganization (noun)
the imposition of a new organization; organizing differently (often involving extensive and drastic changes)	the imposition of a new organization; organizing differently (often involving extensive and drastic changes)
	an extensive alteration of the structure of a corporation or government