/ Thesaurus / R Synonyms of rattlesnake root Find synonyms for: Noun1. rattlesnake root, Prenanthes purpurea, herb, herbaceous plantusage: herb of central and southern Europe having purple florets2. rattlesnake root, herb, herbaceous plantusage: a plant of the genus NabalusWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language