Rejigger and Shake-up

Shake-up and rejigger are semantically related. In some cases you can replace phrase "Shake-up" with "Rejigger", this terms are similar.

Shake-up noun - The imposition of a new organization; organizing differently (often involving extensive and drastic changes).

Rejigger and shake-up are semantically related. Sometimes you can use "Rejigger" instead a verb phrase "Shake-up".