WordNet sense 1 (receptacle providing a place in a wiring system where current can be taken to run electrical devices):

wall socket, electric outlet, electric receptacle, electrical outlet, wall plug

WordNet sense 2 (a place of business for retailing goods):

mercantile establishment, retail store, sales outlet

WordNet sense 3 (an opening that permits escape or release):

exit, issue

WordNet sense 4 (activity that frees or expresses creative energy or emotion):

release, vent, release