consolidation,
integration the act of combining into an integral whole; "a consolidation of two corporations"; "after their consolidation the two bills were passed unanimously"; "the defendants asked for a consolidation of the actions against them"
centralisation -
Alternative spelling of centralization.
Wikipedia
Centralisation, or centralization, is the process by which the activities of an organisation, particularly those regarding planning decision-making, become concentrated within a particular location and/or group. In political science, this refers to the concentration of a government's power - both geographically and politically, into a centralised government. In neuroscience, centralization refers to the evolutionary trend of the nervous system to be partitioned into a central nervous system and peripheral nervous system.
