1) Beholder 2) Bleacherite 3) Bystander 4) Denizen of the grandstand 5) Eyewitness 6) Looker 7) Looker-on 8) Observer 9) Onlooker 10) Passer by 11) Perceiver 12) Rubberneck 13) Sightseer 14) Sports fan 15) Stands sitter 16) Viewer 17) Watcher 18) Witness 1) Browser 2) Bystander 3) Cheerer 4) Eyer 5) Eyewitness 6) Looker 7) Looker-on 8) Moviegoer 9) Observer 10) Ogler 11) Onlooker 12) Peeper 13) Playgoer 14) Starer 15) Theatergoer 16) Theatregoer 17) Viewer 18) Voyeur 19) Voyeuristic 20) Voyeuristical 21) Watcher 22) Looker on 
• (n.) One who on; one who sees or beholds; a beholder; one who is personally present at, and sees, any exhibition; as, the spectators at a show.
A single member of the audience.
Spec·ta'tor noun [ Latin spectator : confer French spectateur . See Spectacle .] One who on; one who sees or beholds; a beholder; one who is personally present at, and sees, any exhibition; as, the spectators at a show. 'Devised and played to take spectators .' S...
[n] - a close observer
noun a close observer; someone who looks at something (such as an exhibition of some kind); `the spectators applauded the performance`; `television viewers`; `sky watchers discovered a new star`
a close observer; someone who looks at something[SAT terms] a close observer; someone who looks at something