urban area vs sprawl

urban area and sprawl both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban area	Yes	No	No	No
sprawl	Yes	No	Yes	No

As nouns, sprawl is a hyponym of urban area; that is, sprawl is a word with a more specific, narrower meaning than urban area:

Other hyponyms of urban area include megalopolis, conurbation, urban sprawl, municipality, new town, barrio.

urban area (noun)	sprawl (noun)
a geographical area constituting a city or town	an ungainly posture with arms and legs spread about
	an aggregation or continuous network of urban communities

urban area (verb)	sprawl (verb)
	sit or lie with one's limbs spread out
	go, come, or spread in a rambling or irregular way