/ Thesaurus / W Synonyms of water plantain Find synonyms for: Noun1. water plantain, Alisma plantago-aquatica, marsh plant, bog plant, swamp plantusage: marsh plant having clusters of small white or pinkish flowers and broad pointed or rounded leavesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language