/ Thesaurus / P Synonyms of peronospora hyoscyami Find synonyms for: Noun1. tobacco mildew, Peronospora hyoscyami, downy mildew, false mildewusage: fungus causing a downy mildew on growing tobaccoWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: bibliophile Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language