Breadcrumb Home > Thesaurus > O Synonyms of onions Find synonyms for: Noun 1. onion, bulb usage: the bulb of an onion plant 2. onion, onion plant, Allium cepa, alliaceous plant usage: bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb 3. onion, vegetable, veggie, veg usage: an aromatic flavorful vegetable WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of onions (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: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language