reorganization vs shakeup

reorganization and shakeup both are nouns.

Word	Noun	Adjective	Verb	Adverb
reorganization	Yes	No	No	No
shakeup	Yes	No	No	No

As nouns, reorganization and shakeup are synonyms defined as:

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

Other synonyms of reorganization include reorganisation, shake-up.

reorganization (noun)	shakeup (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