(n.) One who voyages; one who sails or passes by sea or water.

adventurer alpinist astronaut camper climber comers and goers commuter cosmopolite cruiser excursionist explorer fare globe-girdler globe-trotter goer hajji jet set jet-setter journeyer mariner mountaineer palmer passenger passerby pathfinder pilgrim pioneer rubberneck rubbernecker sailor sightseer straphanger tourer tourist trailblazer trailbreaker transient traveler trekker tripper viator visiting fireman voortrekker voyageur wayfarer world-traveler