Hexachord is a term that refers to a musical scale consisting of six notes. It is commonly used in classical and medieval music theory. There are several synonyms that can be used to describe a hexachord, such as six-note scale, six-tone scale, or six-step scale. In some cases, the term hexatonic scale can also be used to describe a hexachord. Additionally, there are different types of hexachords, such as the natural hexachord, the soft hexachord, and the hard hexachord. These terms are used to describe different arrangements of the six notes within the scale. Despite their difference in terminology, all of these synonyms describe the same fundamental concept and are used interchangeably in the world of music theory.