The crossword solution for the term PA. PORT is ERIE, which is a four-letter word. Erie is a city in northwestern Pennsylvania, located on the shore of Lake Erie. It is the fourth-largest city in the state and the largest city in Northwestern Pennsylvania. It is also the principal city of the Erie Metropolitan Statistical Area, which consists of Erie County. The city is known for its manufacturing industry, as well as its cultural attractions such as the Erie Zoo, Presque Isle State Park, and Waldameer Park & Water World.