Breadcrumb Home > Thesaurus > S Synonyms of spinous Find synonyms for: Adjective 1. spinous (vs. spineless), spiny usage: having spines; "the dorsal fin is spinous" 2. acanthoid, acanthous, spinous, pointed (vs. pointless) usage: shaped like a spine or thorn WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of spinous (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: demagogue Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language