metropolis vs Nidaros

metropolis and Nidaros both are nouns.

Word	Noun	Adjective	Verb	Adverb
metropolis	Yes	No	No	No
Nidaros	Yes	No	No	No

metropolis (noun)	Nidaros (noun)
people living in a large densely populated municipality	a port in central Norway on Trondheim Fjord
a large and densely populated urban area; may include several independent administrative districts