/ Thesaurus / I Synonyms of intestinal flu Find synonyms for: Noun1. gastroenteritis, stomach flu, intestinal flu, inflammatory diseaseusage: inflammation of the stomach and intestines; can be caused by Salmonella enteritidisWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language