Breadcrumb Home > Thesaurus > Y Synonyms of yeast Find synonyms for: Noun 1. yeast, barm, leaven, leavening usage: a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey 2. yeast, fungus usage: any of various single-celled fungi that reproduce asexually by budding or division WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of yeast (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: demagogue Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language