Comedy opera by Gilbert and Sullivan is a term used to refer to the series of comic operas written by the famous duo, William Gilbert and Arthur Sullivan. The most popular works include 'Iolanthe' (8 letters), 'The Pirates of Penzance' (8 letters), 'The Mikado' (6 letters), 'HMS Pinafore' (8 letters) and 'Princess Ida' (3 letters). These works are known for their witty dialogue, memorable characters and catchy tunes. They have been performed around the world since their debut in the late 19th century.