/ Thesaurus / A Synonyms of aconitum napellus Find synonyms for: Noun1. monkshood, helmetflower, helmet flower, Aconitum napellus, aconiteusage: a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconiteWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: confectionery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language