The term 'viola' is a stringed instrument that is similar to the violin, but larger and tuned a fifth lower. It is also known as an ALTO, which is four letters in length. Another name for the viola is the gamba, which is five letters in length. The viola is sometimes referred to as a FIDDLE, which is six letters in length. Lastly, the viola is sometimes called a PANSY, which is also five letters in length.