/ Thesaurus / S Synonyms of sour bread Find synonyms for: Noun1. sour bread, sourdough bread, bread, breadstuff, staff of lifeusage: made with a starter of a small amount of dough in which fermentation is activeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language