/ Thesaurus / S Synonyms of sea captain Find synonyms for: Noun1. master, captain, sea captain, skipper, officer, ship's officerusage: an officer who is licensed to command a merchant shipWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language