Plaza
Part of speech: noun
Definition: a town's public square. an open area used for gathering in a city, often having small trees and sitting benches.
Example sentence: The evolution of the plaza always came from the idea of just a really good place to ride a skateboard that you could ride at anytime, and that's what the foundation always stands for - being a place that's free, open and legal... for those that are technical, to do really hard stuff, and for those who are learning, to just have fun.
Piazza
Part of speech: noun
Definition: A public square, especially in an Italian city.A veranda.