KnowraSecurity guardLinked fromLinked fromThe 3 pages that link to Security guard, each with the reason it gives.All 3Broader topic 1Compared with 2BouncerCompared with: Security guards may have broader duties than door staff at entertainment venues.Private investigatorCompared with: Security guards primarily protect sites; investigators primarily gather information about cases.Private securityBroader topic: Guarding is the most visible form of private security.