/ Thesaurus / B Synonyms of barrel vault Find synonyms for: Noun1. barrel vault, vaultusage: the simplest form of vault; a single continuous archWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: aversion Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language