shake-up vs reorganisation

shake-up and reorganisation both are nouns.

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

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

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

Other synonyms of shake-up include reorganization, shakeup.

shake-up (noun)	reorganisation (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)