Worcester vs metropolis

Worcester and metropolis both are nouns.

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

Worcester (noun)	metropolis (noun)
a cathedral city in west central England on the River Severn	people living in a large densely populated municipality
an industrial and university city in central Massachusetts to the west of Boston	a large and densely populated urban area; may include several independent administrative districts
United States lexicographer who was accused of plagiarism by Noah Webster (1784-1865)