/ Thesaurus / C Synonyms of coast guard Find synonyms for: Noun1. coastguard, military service, armed service, serviceusage: a military service responsible for the safety of maritime traffic in coastal watersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language