/ Thesaurus / D Synonyms of diuretic drug Find synonyms for: Noun1. diuretic drug, diuretic, water pill, drugusage: any substance that tends to increase the flow of urine, which causes the body to get rid of excess waterWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language