/ Thesaurus / N Synonyms of nga Find synonyms for: Noun1. National Geospatial-Intelligence Agency, NGA, agency, federal agency, government agency, bureau, office, authorityusage: a combat support agency that provides geographic intelligence in support of national securityWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language