The term 'Speedy Pirate Ship' can be summarized as a 7-letter word, 'CORSAIR'. A CORSAIR is a type of pirate ship that was used in the 16th to 19th centuries. It was known for its speed and agility, making it a formidable vessel on the high seas. The CORSAIR was also used by the French Navy during the Napoleonic Wars. It was a powerful warship that could outrun most other vessels. Today, the term 'CORSAIR' is still used to refer to a fast and agile ship.