city vs Aquila

city and Aquila both are nouns.

Word	Noun	Adjective	Verb	Adverb
city	Yes	No	No	No
Aquila	Yes	No	No	No

city (noun)	Aquila (noun)
people living in a large densely populated municipality	a genus of Accipitridae, containing the true eagles (Aquila)
a large and densely populated urban area; may include several independent administrative districts	the provincial capital of the Abruzzi region in central Italy
an incorporated administrative district established by state charter	a constellation in the Milky Way near Cygnus; contains the star Altair