/ Thesaurus / E Synonyms of espionage agent Find synonyms for: Noun1. espionage agent, spy, undercover agentusage: someone employed to spy on another country or business competitorWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language