Breadcrumb Home > Thesaurus > B Synonyms of basement Find synonyms for: Noun 1. basement, cellar, floor, level, storey, story usage: the lowermost portion of a structure partly or wholly below ground level; often used for storage 2. basement, support usage: the ground floor facade or interior in Renaissance architecture WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of basement (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: minatory Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language