Referment is a noun used to describe the process of fermenting again, specifically with ingredients such as yeast and bacteria. There are various synonyms for the word referment, including second fermentation, double fermentation, secondary fermentation, and re-fermentation. These words can be used interchangeably depending on the context in which they appear. Additionally, terms like repeat fermentation, additional fermentation, and extra fermentation can also be used in place of referment. Regardless of the synonym used, the process of refermenting is essential in various industries, particularly in the production of alcoholic beverages like wine and beer. The refermentation process makes them more flavorful and refreshing for consumers.