turf vs city district

turf and city district both are nouns.

Word	Noun	Adjective	Verb	Adverb
turf	Yes	No	Yes	No
city district	Yes	No	No	No

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

turf (noun)	city district (noun)
range of jurisdiction or influence	a district of a town or city
the territory claimed by a juvenile gang as its own
surface layer of ground containing a mat of grass and grass roots

turf (verb)	city district (verb)
cover (the ground) with a surface layer of grass or grass roots