/ Thesaurus / C Synonyms of cardamine douglasii Find synonyms for: Noun1. purple cress, Cardamine douglasii, bittercress, bitter cressusage: small perennial herb of cooler regions of North America with racemose purple flowersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: perennial Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language