According to the show's creator, the word "Nor" just means that you're describing an object of some kind.
Q. DS9 was formerly Terok Nor. An upcoming episode about another Cardassian
station is "Empok Nor." And in "The Maquis," the Cardassian freighter
Bok'Nor was destroyed. So: what does the Cardie word "Nor" mean?...