Purple onion, also known as red onion, belongs to the Allium cepa family. It is often used in various culinary dishes, including salads, sandwiches, and soups. This versatile vegetable has a mild and slightly sweet flavor that makes it a popular choice in the kitchen. Some synonyms for purple onion include Spanish onion, Bermuda onion, and shallot. These varieties of onion come in different colors, sizes, and shapes. Spanish onions have a yellow-brown skin and are often sweeter than purple onions, while Bermuda onions are flatter with a milder flavor. Shallots are smaller and have a more delicate taste. All these onion types can be used interchangeably in recipes that call for purple onion, depending on personal taste preference.