seafarer(n = noun.person) gob, jack, jack-tar, mariner, old salt, sea dog, seaman, tar - a man who serves as a sailor;
is a kind of crewman, sailor
has particulars: able-bodied seaman, able seaman, bo's'n, bo'sun, boatswain, bos'n, bosun, deckhand, roustabout, helmsman, steerer, steersman, bargee, bargeman, lighterman, officer, ship's officer, pilot, sea lawyer, whaler

   One who follows the sea as a business; a mariner; a sailor. [1913 Webster]

seafarer, n.
1 a sailor.
2 a traveller by sea.

N  sailor, mariner, navigator, seaman, seafarer, seafaring man, dock walloper, tar, jack tar, salt, able seaman, A, B, man-of-war's man, bluejacket, galiongee, galionji, marine, jolly, midshipman, middy, skipper, shipman, boatman, ferryman, waterman, lighterman, bargeman, longshoreman, bargee, gondolier, oar, oarsman, rower, boatswain, cockswain, coxswain, steersman, pilot, crew, aerial navigator, aeronaut, balloonist, Icarus, aeroplanist, airman, aviator, birdman, man-bird, wizard of the air, aviatrix, flier, pilot, test pilot, glider pilot, bush pilot, navigator, flight attendant, steward, stewardess, crew, astronaut, cosmonaut, parachutist, paratrooper.