/ Thesaurus / R Synonyms of rhamnus purshianus Find synonyms for: Noun1. cascara buckthorn, bearberry, bearwood, chittamwood, chittimwood, Rhamnus purshianus, buckthornusage: shrubby tree of the Pacific coast of the United States; yields cascara sagradaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language