/ Thesaurus / M Synonyms of mother of pearl Find synonyms for: Noun1. mother-of-pearl, nacre, shellusage: the iridescent internal layer of a mollusk shellWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language