/ Thesaurus / R Synonyms of rhus diversiloba Find synonyms for: Noun1. western poison oak, Toxicodendron diversilobum, Rhus diversiloba, poisonous plantusage: poisonous shrub of the Pacific coast of North America that causes a rash on contactWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language