spectator (n.)

• acquirer
• addressee
• aficionado
• attender
• attestant
• attestator
• attester
• audience
• auditor
• beholder
• buff
• bystander
• congregation
• consignee
• deadhead
• deponent
• eyewitness
• fan
• frequenter
• gallery
• gazer
• getter
• groundling
• habitue
• hearer
• holder
• house
• informant
• informer
• listener
• looker
• looker-on
• moviegoer
• observer
• onlooker
• orchestra
• passerby
• patron
• payee
• perceiver
• pit
• playgoer
• procurer
• receiver
• recipient
• seer
• standee
• swearer
• taker
• testifier
• theater
• theatergoer
• trustee
• viewer
• visitor
• voucher
• watcher
• witness