Cogeners are chemicals that are produced alongside a desired substance, such as alcohol, during the fermentation or distillation process. These chemicals can have a negative impact on the taste and quality of the final product. Synonyms for cogeners include impurities, contaminants, congeners, byproducts, and secondary metabolites. These terms represent the unwanted substances that can be present in a variety of different industries, including food and beverage, pharmaceuticals, and manufacturing. It is important to identify and minimize cogeners in order to ensure the highest quality and purity of the desired end product.