/ Thesaurus / F Synonyms of fool's parsley Find synonyms for: Noun1. fool's parsley, lesser hemlock, Aethusa cynapium, poisonous plantusage: European weed naturalized in America that resembles parsley but causes nausea and poisoning when eatenWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language