/ Thesaurus / J Synonyms of jack tar Find synonyms for: Noun1. mariner, seaman, tar, Jack-tar, Jack, old salt, seafarer, gob, sea dog, sailor, crewmanusage: a man who serves as a sailorWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language