A rock group is a collective term used to describe a band or musical ensemble that typically performs rock music. Synonyms for this term include "rock band", "rock outfit", "rock combo", "rock ensemble", "rock act", "rock crew", "rock team", and "rock squad". These synonyms may connote different sizes or styles of rock groups, such as a duo or a heavy metal band. Additionally, some synonyms may add a certain degree of attitude or theatricality to the term, such as "rock stars", "rock gods", or "rock legends". Regardless of the synonym used, a rock group typically comprises of performers on vocals, guitars, bass, drums, and occasionally other instruments.