/ Thesaurus / L Synonyms of lobefin Find synonyms for: Noun1. crossopterygian, lobefin, lobe-finned fish, bony fishusage: any fish of the order Crossopterygii; most known only in fossil formWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language