Pitch is the distance from the crest of one thread to the next. Because the vast majority of screw threadforms are single-start threadforms, their lead and pitch are the same. Single-start means that there is only one ridge wrapped around the cylinder of the screw's body.
Definition of metropolis. 1  1 : the chief or capital city of a country, state, or region. 2  2 : the city or state of origin of a colony (as of ancient Greece) 3  3a : a city regarded as a center of a specified activity an industrial metropolis a cattle metropolisb : a large important city one of Europe's great metropolises.
I also thought of Metropolis to be the grand city of New York as Metropolis is the more prominent city (in comparison to Gotham) similar to how New York has been the more prominent one between it and Chicago. The other major DC cities im having a tougher time putting my finger on.