Seattle vs metropolis

Seattle and metropolis both are nouns.

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

Seattle (noun)	metropolis (noun)
a major port of entry and the largest city in Washington; located in west central Washington on the protected waters of Puget Sound with the snow-capped peaks of the Cascade Range and Mount Rainier visible to the south and east; an aerospace and computer center; site of the University of Washington	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts