observer Synonyms

beholder perceiver percipient commentator testifier triandrous verifier viewer watchdog watcher watchman witness supervisor student stander-by scrutinizer signalman signer spectator spectatress spectatrix spotter spy witnesser writer looker-on spectators banksman fly on the wall passerby sightseer inactive person televiewer onlookers Watchers nonparticipant invigilator radar viewers blogger gawker moviegoer onlooker rubberneck rubbernecker theatergoer monitors scrutineer acknowledger discerner