Protomer is a term used in biochemistry and refers to a single unit of a protein that can aggregate to form larger structures. However, there are several synonyms for protomer, such as monomer, subunit, and building block. A monomer is a molecule that can bind chemically or form a covalent bond to other molecules to create a polymer. A subunit is a part of an intact protein composed of multiple related polypeptides. Finally, a building block is a fundamental unit that can be used to assemble other molecules. Understanding the various synonyms for protomer is essential in the field of biochemistry as it helps researchers communicate effectively and accurately describe the components of complex biological structures.