/ Thesaurus / M Synonyms of mountain watercress Find synonyms for: Noun1. American watercress, mountain watercress, Cardamine rotundifolia, watercressusage: mat-forming perennial found in cold springs of the eastern United StatesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language