/ Thesaurus / D Synonyms of de niro Find synonyms for: Noun1. De Niro, Robert De Nirousage: United States film actor who frequently plays tough characters (born 1943)WordNet 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