Sparger is a word that may not be commonly known, but it is used in various industries. It refers to a device that diffuses a gas (usually air or nitrogen) into a liquid, typically in a process that requires aeration. There are other words that can be used interchangeably with sparger, such as aerator, diffuser, bubbler, sprayer, and atomizer. These words describe the same device but may have slightly different applications or uses. For example, aerator and diffuser generally refer to devices that introduce air into a liquid for oxygenation purposes, while a sprayer or atomizer may refer to devices that produce a fine mist or spray for other applications.