gold coast vs neighborhood

gold coast and neighborhood both are nouns.

Word	Noun	Adjective	Verb	Adverb
gold coast	Yes	No	No	No
neighborhood	Yes	No	No	No

As nouns, neighborhood is a hypernym of gold coast; that is, neighborhood is a word with a broader meaning than gold coast:

gold coast: a rich neighborhood noted for expensive homes and luxurious living; usually along a coastal area
neighborhood: a surrounding or nearby region

Other hypernyms of gold coast include locality, neck of the woods, neighbourhood, vicinity.

gold coast (noun)	neighborhood (noun)
a rich neighborhood noted for expensive homes and luxurious living; usually along a coastal area	people living near one another
	a surrounding or nearby region
	an area within a city or town that has some distinctive features (especially one forming a community)
	the approximate amount of something (usually used prepositionally as in `in the region of')