/ Thesaurus / D Synonyms of duc de richelieu Find synonyms for: Noun1. Richelieu, Duc de Richelieu, Armand Jean du Plessis, Cardinal Richelieuusage: French prelate and statesman; principal minister to Louis XIII (1585-1642)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language