/ Thesaurus / G Synonyms of gustavus iv Find synonyms for: Noun1. Gustavus, Gustavus IVusage: king of Sweden whose losses to Napoleon I led to his being deposed in 1809 (1778-1837)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fortuitous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language