/ Thesaurus / I Synonyms of international maritime organization Find synonyms for: Noun1. International Maritime Organization, IMO, United Nations agency, UN agencyusage: the United Nations agency concerned with international maritime activitiesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language