/ Thesaurus / P Synonyms of poisonous plant Find synonyms for: Noun1. poisonous plant, plant, flora, plant lifeusage: a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organismWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language