Shake-up and Underground activities

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

Underground activities and shake-up are semantically related In some cases you can use "Underground activities" instead a noun phrase "Shake-up".

Shake-up and underground activities are semantically related in often in politics topic. Sometimes you can use "Shake-up" instead a noun phrase "Underground activities".