An ionizer is a device that produces negative and positive ions to purify the air. To describe this type of device, there are several synonyms available such as an ion generator, an air ionizer, an ion purifier or an ionic air cleaner. These terms can be used interchangeably for products that utilise negative ions to remove contaminates and improve the air quality. Additionally, other synonyms include air revitalizer, air energizer, and air-enhancer which along with ionizer describes products that produces fresh and clean air. These synonyms are helpful for consumers and product manufacturers to highlight the specific features and benefits of this technology.