sentinel Synonyms

lookout sentry lookout man security guard patrol patrolman picket watchman protector watcher watch spotter vigil keeper defender scout garrison guard guardian vigilante patrols watchdog warder Watchmen Watchers sentry duty border guard advance guard night watchman guard post sentry-box border patrol caretaker baby-sitter warden ward vigilant beacon hayward guardsman guardship guards escort custodian curator conservator chaperon lighthouse monitor observatory