/ Thesaurus / D Synonyms of diane de poitiers Find synonyms for: Noun1. Diane de Poitiers, Duchesse de Valentinoisusage: French noblewoman who was the mistress of Henry II; she had more influence over him than did his wife Catherine de Medicis (1499-1566)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language