/ Thesaurus / B Synonyms of bathing costume Find synonyms for: Noun1. swimsuit, swimwear, bathing suit, swimming costume, bathing costume, garmentusage: tight fitting garment worn for swimmingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language