/ Thesaurus / S Synonyms of surveillance system Find synonyms for: Noun1. surveillance system, closed-circuit televisionusage: a closed-circuit television system used to maintain close observation of a person or groupWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language