The term 'Portuguese Port' refers to three major ports in Portugal: Lisbon (6 letters), Oporto (6 letters), and Lagos (5 letters). Lisbon is the capital of Portugal and is located on the Tagus River. Oporto is the second largest city in Portugal and is located on the Douro River. Lagos is a coastal city located in the Algarve region of Portugal. All three of these ports are important for trade and commerce in Portugal.