THESAURUS
onlooker
TV-viewer, abutter, adjoiner, beholder, bird-watcher, borderer, bystander, drugstore cowboy, eyewitness, gaper, gazer, gazer-on, girl-watcher, goggler, immediate neighbor, kibitzer, looker, looker-on, neighbor, neighborer, observer, ogler, perceiver, percipient, seer, sidewalk superintendent, spectator, spectatress, spectatrix, tangent, televiewer, television-viewer, video-gazer, viewer, watcher, witness
ROGET THESAURUS
onlooker
Spectator
N
spectator, beholder, observer, looker-on,
onlooker, witness, eyewitness, bystander, passer by, sightseer, rubberneck, rubbernecker, spy, sentinel.