Allium Cepa, commonly known as onion, is a versatile vegetable that adds a unique flavor to a range of dishes. The word onion itself can be used interchangeably with Allium Cepa. Other common synonyms include bulb onion, common onion, and garden onion. Red onion and shallot are varieties of Allium Cepa that have slightly different flavors and textures, but are still often referred to simply as onions. Some more obscure synonyms for Allium Cepa include spring onion, bunching onion, and Welsh onion, which are all members of the same family of allium vegetables. Whether you prefer white, red, or shallot onions, they all provide the distinct flavor and health benefits of Allium Cepa.