city vs administrative division

city and administrative division both are nouns.

Word	Noun	Adjective	Verb	Adverb
city	Yes	No	No	No
administrative division	Yes	No	No	No

As nouns, administrative division is a hypernym of city; that is, administrative division is a word with a broader meaning than city:

Other hypernyms of city include administrative district, territorial division.

city (noun)	administrative division (noun)
people living in a large densely populated municipality	a district defined for administrative purposes
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter