straphanger (n.)

• adventurer
• alpinist
• astronaut
• camper
• climber
• commuter
• cosmopolite
• cruiser
• excursionist
• explorer
• fare
• goer
• hajji
• journeyer
• mariner
• mountaineer
• palmer
• passenger
• passerby
• pathfinder
• pilgrim
• pioneer
• rubberneck
• rubbernecker
• sailor
• sightseer
• tourer
• tourist
• trailblazer
• transient
• traveler
• trekker
• tripper
• viator
• voyager
• wayfarer