town vs administrative district

town and administrative district both are nouns.

Word	Noun	Adjective	Verb	Adverb
town	Yes	No	No	No
administrative district	Yes	No	No	No

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

Other hypernyms of town include administrative division, territorial division.

town (noun)	administrative district (noun)
the people living in a municipality smaller than a city	a district defined for administrative purposes
an urban area with a fixed boundary that is smaller than a city
an administrative division of a county