/ Thesaurus / G Synonyms of g man Find synonyms for: Noun1. G-man, FBI agent, government man, government agentusage: a special law-enforcement agent of the Federal Bureau of InvestigationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language