The term 'chorus boy' is commonly used to refer to a male performer who sings and dances as part of a chorus line. However, there are several synonyms that can be used to describe such performers. These include dance ensemble member, background dancer, backup singer, chorus member, and ensemble singer. Other terms that can be used to describe male performers in a chorus line include stage hand, swing dancer, and vocal support. These terms help to reflect the range of skills and roles that such performers bring to a production, and showcase the importance of teamwork and collaboration in creating a successful performance.