/ Thesaurus / S Synonyms of security guard Find synonyms for: Noun1. watchman, watcher, security guard, guardusage: a guard who keeps watchWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language