beholder, observer, perceiver - a person who becomes aware (of things or events) through the senses

browser - a viewer who looks around casually without seeking anything in particular

bystander - a nonparticipant spectator

cheerer - a spectator who shouts encouragement

eyewitness - a spectator who can describe what happened

motion-picture fan, moviegoer - someone who goes to see movies

ogler - a viewer who gives a flirtatious or lewd look at another person

looker-on, onlooker - someone who looks on

playgoer, theatergoer, theatregoer - someone who attends the theater

rubberneck - a person who stares inquisitively

spy - a secret watcher; someone who secretly watches other people; "my spies tell me that you had a good time last night"

starer - a viewer who gazes fixedly (often with hostility)

peeper, Peeping Tom, voyeur - a viewer who enjoys seeing the sex acts or sex organs of others

adult female, woman - an adult female person (as opposed to a man); "the woman kept house while the man hunted"