Monosaccharides are simple sugars, which are the building blocks of complex carbohydrates. There are many synonyms for monosaccharides, including single sugars, simple carbohydrates, and monomers. These sugars provide the body with a quick source of energy, and are broken down into glucose by the digestive system. Other synonyms for monosaccharides include hexoses, such as glucose, fructose, and galactose, as well as pentoses, such as ribose and deoxyribose. Additionally, monosaccharides can be classified as aldoses or ketoses, depending on the presence of an aldehyde or keto group in their molecular structure. Overall, there are several synonyms for monosaccharides, all of which highlight their importance as essential nutrients in the human diet.