/ Thesaurus / S Synonyms of spiny finned Find synonyms for: Adjective1. spiny-finnedusage: of or relating to fish with spiny finsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language