/ Thesaurus / S Synonyms of sofa bed Find synonyms for: Noun1. convertible, sofa bed, sofa, couch, loungeusage: a sofa that can be converted into a bedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language