Word Study
onlooker
OXFORD DICTIONARY
onlooker, n. a non-participating observer; a spectator.
Derivative
onlooking adj.
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, witnessROGET THESAURUS
onlooker
Spectator
N spectator, beholder, observer, looker-on, onlooker, witness, eyewitness, bystander, passer by, sightseer, rubberneck, rubbernecker, spy, sentinel.For further exploring for "onlooker" in Webster Dictionary Online