1) Alter 2) Bring under a single control 3) Centralise 4) Change 5) Concentrate 6) Make central 7) Modify 8) To consolidate or concentrate Found on https://www.crosswordclues.com/clue/centralize
Cen'tral·ize transitive verb [ imperfect & past participle Centralized ; present participle & verbal noun Centralizing .] [ Confer French centraliser .] To draw or bring to a center point; to gather into or about a center; to bring... Found on http://www.encyclo.co.uk/webster/C/44