What words do you use to describe towns and cities?

Town, city, big city, village, downtown, country, countryside, suburbs, urban center, rural, other?

Which words do you use regularly to describe various sized cities, and which do you never use? How do you decide which term to use? The population, how tall the buildings are, the size of the location relative to the next city over?

I think there actually might be technical definitions for each, but I am curious how the words are actually used.