/ Thesaurus / G Synonyms of gregorian chant Find synonyms for: Noun1. plainsong, plainchant, Gregorian chant, chantusage: a liturgical chant of the Roman Catholic ChurchWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language