/ Thesaurus / G Synonyms of gill bar Find synonyms for: Noun1. gill arch, branchial arch, gill bar, structure, anatomical structure, complex body part, bodily structure, body structureusage: one of the bony or cartilaginous arches on each side of the pharynx that support the gills of fishes and aquatic amphibiansWordNet 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