to play a leading role;  to play a central part
 central part;  heart (of a city)
 to play a central role;  to take a leading part
 center;  centre;  metropolis
 leader;  central personage
 high street;  town centre (center)
 self-centered;  stuck on oneself
 centre line;  center line;  central line
 central city;  major city (in a region)
 core (of planets, stars, galaxies, etc.);  nucleus (of comets, galaxies, etc.)
 selfishness;  egotism;  egoism;  egocentricity
 city centre (center);  inner city;  town centre
 policy of alignment with the United Nations;  UN-centrism