The term 'English Seaport' can be broken down into two crossword solutions: Poole (5 letters) and Bristol (7 letters). Poole is a coastal town in Dorset, England, located on the English Channel. It is known for its natural harbour and is a popular tourist destination. Bristol is a city in South West England, located on the River Avon. It is the largest city in the South West region and is an important port city, with a long history of trade and maritime activities.