passerby (n.)
- adventurer
- alpinist
- astronaut
- attestant
- attestator
- attester
- beholder
- bystander
- camper
- climber
- commuter
- cosmopolite
- cruiser
- deponent
- excursionist
- explorer
- eyewitness
- fare
- gazer
- goer
- hajji
- informant
- informer
- journeyer
- kibitzer
- looker
- looker-on
- mariner
- mountaineer
- observer
- ogler
- onlooker
- palmer
- passenger
- passer
- pathfinder
- perceiver
- percipient
- pilgrim
- pioneer
- rubberneck
- rubbernecker
- sailor
- seer
- sightseer
- sojourner
- spectator
- straphanger
- swearer
- testifier
- tourer
- tourist
- trailblazer
- transient
- traveler
- trekker
- tripper
- viator
- viewer
- voucher
- voyager
- watcher
- wayfarer
- witness
