traveler vs fellow traveler

Other hyponyms of traveler include absentee, air traveler, air traveller, arrival, arriver, comer, astronaut, cosmonaut, spaceman, business traveler, bearer, carrier, toter, companion, fellow traveller, entrant, flier, flyer, follower, alien, foreigner, noncitizen, outlander, hosteller, courier, messenger, migrant, migrator, motorcyclist, mover, musher, passenger, rider, footer, pedestrian, walker, rafter, raftman, raftsman, rider, rider, runner, scourer, bather, natator, swimmer, holidaymaker, tourer, tourist, transient, trekker, visitant, visitor, voyager, bird of passage, roamer, rover, wanderer, journeyer, wayfarer.