The term TUBA refers to a large, low-pitched brass instrument. It is related to other instruments such as the SAXHORN (7 letters), HORN (4 letters), SOUSAPHONE (10 letters), and bsshorn (7 letters). The SAXHORN is a brass instrument with a conical bore, while the HORN is a brass instrument with a cylindrical bore. The SOUSAPHONE is a type of tuba that wraps around the body of the player, and the bsshorn is a type of SAXHORN with a wider bore.