The bassoon's relative is a musical instrument that is quite similar but produces a slightly different sound. Some synonyms for the bassoon's relative include the contrabassoon, the double bassoon, the bass oboe, and the bass clarinet. The contrabassoon is the most closely related to the bassoon and is commonly used in orchestral music. It is larger and produces a lower tone than the bassoon. The double bassoon is less common and is known for its extended range, producing even lower notes than the contrabassoon. The bass oboe and bass clarinet are also lower-pitched versions of their respective instruments. Musicians often use these synonyms interchangeably, depending on the context of the music.