/ Thesaurus / M Synonyms of motilin Find synonyms for: Noun1. motilin, gastrointestinal hormone, GI hormonesusage: a gastrointestinal hormone that apparently participates in controlling smooth muscle contractions in the stomach and small intestineWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: buoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language