/ Thesaurus / G Synonyms of gastric lavage Find synonyms for: Noun1. gastric lavage, lavageusage: washing out the stomach with sterile water or a saltwater solution; removes blood or poisons; "when the doctor ordered a gastric lavage the hospital pumped out my stomach"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fortuitous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language