Breadcrumb Home > Thesaurus > R Synonyms of rattlebrained Find synonyms for: Adjective 1. rattlebrained, rattlepated, scatterbrained, scatty, foolish (vs. wise) usage: lacking sense or discretion; "his rattlebrained crackpot ideas"; "how rattlepated I am! I've forgotten what I came for"- Glenway Westcott WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of rattlebrained (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: plebeian Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language