Nouns

(n)conurbation, urban sprawl, sprawlan aggregation or continuous network of urban communities
(n)sprawl, sprawlingan ungainly posture with arms and legs spread about

Verbs

(v)sprawlsit or lie with one's limbs spread out
(v)sprawl, stragglego, come, or spread in a rambling or irregular way“Branches straggling out quite far”