/ Thesaurus / G Synonyms of gill cleft Find synonyms for: Noun1. gill slit, branchial cleft, gill cleft, structure, anatomical structure, complex body part, bodily structure, body structureusage: one of a series of slit openings in the pharynxes of fishes and aquatic amphibians through which water passesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language