/ Thesaurus / B Synonyms of bathing tub Find synonyms for: Noun1. bathtub, bathing tub, bath, tub, vesselusage: a relatively large open container that you fill with water and use to wash the bodyWordNet 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