Breadcrumb Home > Thesaurus > O Synonyms of oat Find synonyms for: Noun 1. oat, cereal, cereal grass usage: annual grass of Europe and North Africa; grains used as food and fodder (referred to primarily in the plural: `oats') 2. oat, grain, food grain, cereal usage: seed of the annual grass Avena sativa (spoken of primarily in the plural as `oats') WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of oat (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: pentimento Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language