Biomolecules are the building blocks of life, and they come in various forms and functions. The term biomolecule is commonly associated with proteins, lipids, carbohydrates, and nucleic acids, but there are several synonyms that describe these molecules. Proteins can be referred to as polypeptides, while lipids can be called fats or oils. Carbohydrates can be split into simple sugars or complex carbohydrates, and nucleic acids can be subdivided into DNA, RNA, and non-coding RNA. Other related terms that may be used include macromolecules, organic molecules, biomacromolecules, and biochemicals. Ultimately, these synonyms all describe the essential molecules that make up living organisms.