watchdog Synonyms

guarddog warden trustee supervisor superintendent steward spial sentry sentinel scrutineer regulator ranger protector warder watch supervisory body cleaning person swamper maintenance person housesitter ombudsman invigilator bird dog caretaker guard dog attack dog watchman preserver patrol overseer cop conservator concierge claviger champion cerberus censor castellan bodyguard bandog auditor attendant curator custodian observer monitor mastiff lookout keeper inspector