L.A. vs metropolis

L.A. and metropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
L.A.	Yes	No	No	No
metropolis	Yes	No	No	No

L.A. (noun)	metropolis (noun)
a city in southern California; motion picture capital of the world; most populous city of California and second largest in the United States	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts