/ Thesaurus / J Synonyms of jawless fish Find synonyms for: Noun1. jawless vertebrate, jawless fish, agnathan, aquatic vertebrateusage: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct formsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: beseech Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language