/ Thesaurus / O Synonyms of onopordum Find synonyms for: Noun1. Onopordum, genus Onopordum, Onopordon, genus Onopordon, asterid dicot genususage: a genus of Eurasian herbs of the family Compositae with prickly foliage and large purplish flowersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language