Stringed instruments are musical instruments that produce sound by vibrating strings. Examples of stringed instruments include lutes (5 letters), ukuleles (4 letters), celli (5 letters), harps (5 letters), lyres (5 letters), viols (5 letters), yoyos (5 letters), cellos (6 letters), violas (6 letters), and zithers (7 letters). These instruments have been used for centuries in many different cultures and musical genres.