Gene clusters are groups of genes on a chromosome that are organized together and are functionally related. There are several synonyms for the term gene cluster that are commonly used in scientific literature. One of the most common alternatives is gene family, which refers to a group of genes that share a common ancestor and are related by sequence similarity. Another synonym is gene cluster region, which is a broader term that can refer to any group of genes that are located in close proximity to each other on a chromosome. Other synonyms for gene cluster include gene neighborhood, gene cluster organization, and gene cluster assembly. Regardless of the term used, gene clusters are important structures in the genome that play a crucial role in regulating gene expression and function.