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. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: criticaster Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language