/ Thesaurus / E Synonyms of epsom salts Find synonyms for: Noun1. Epsom salts, bitter salts, magnesium sulfateusage: hydrated magnesium sulfate that is taken orally to treat heartburn and constipation and injected to prevent seizures2. Epsom salts, purgative, cathartic, physic, aperientusage: (used with a singular noun) hydrated magnesium sulfate used as a laxativeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language