Breadcrumb Home > Thesaurus > H Synonyms of headless Find synonyms for: Adjective 1. headless (vs. headed), acephalous, beheaded, decapitated usage: not having a head or formed without a head ; "the headless horseman"; "brads are headless nails" 2. brainless, headless, unintelligent (vs. intelligent), stupid usage: not using intelligence WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of headless (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: oleaginous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language