What is a group of 5 or 6 or 7 or 8 or 9 singers called?

A group of 5 singers is typically called a quintet, a group of 6 singers is called a sextet, a group of 7 singers is called a septet, a group of 8 singers is called an octet, and a group of 9 singers is called a nonet. These terms are commonly used in music to describe vocal ensembles of varying sizes.