Breadcrumb Home > Thesaurus > W Synonyms of water caltrop Find synonyms for: Noun1. water caltrop, Jesuits' nut, Trapa natans, water chestnut, water chestnut plant, caltropusage: a variety of water chestnutWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: taradiddle Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language