THESAURUS
observer
TV-viewer, ace, air force, beholder, bird-watcher, bomber pilot, bystander, combat pilot, drugstore cowboy, examinant, examiner, eyewitness, fighter pilot, flyboy, gaper, gazer, gazer-on, girl-watcher, goggler, inspector, investigator, kibitzer, looker, looker-on, military pilot, naval pilot, ogler, onlooker, perceiver, percipient, scrutineer, seer, sidewalk superintendent, spectator, spectatress, spectatrix, suicide pilot, televiewer, television-viewer, tester, video-gazer, viewer, visitator, visitor, watcher, witness
ROGET THESAURUS
observer
Spectator
N
spectator, beholder,
observer, looker-on, onlooker, witness, eyewitness, bystander, passer by, sightseer, rubberneck, rubbernecker, spy, sentinel.