mariner (n.)

• adventurer
• alpinist
• astronaut
• bluejacket
• camper
• climber
• commuter
• cosmopolite
• cruiser
• excursionist
• explorer
• fare
• gob
• goer
• hajji
• jack
• jack-tar
• journeyer
• limey
• mountaineer
• palmer
• passenger
• passerby
• pathfinder
• pilgrim
• pioneer
• rating
• rubberneck
• rubbernecker
• sailor
• salt
• seaman
• sightseer
• straphanger
• swab
• tar
• tarpaulin
• tourer
• tourist
• trailblazer
• transient
• traveler
• trekker
• tripper
• viator
• voyager
• wayfarer