The double-bass is a versatile and essential instrument in many music genres, including classical, jazz, and bluegrass. While it is commonly referred to as the double-bass, there are several synonyms and alternative names for the instrument. These include the upright bass, bass viol, contrabass, and bass fiddle. The term "upright bass" is often used in jazz and rock music, while "bass fiddle" is a folk name commonly used in bluegrass music. "Contrabass" is the term preferred by classical musicians and refers to the instrument's low range, while "bass viol" harkens back to the instrument's early days in Renaissance and Baroque music. Regardless of its name, the double-bass remains a beloved addition to many musical ensembles.