vicinity vs gold coast

vicinity and gold coast both are nouns.

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

As nouns, gold coast is a hyponym of vicinity; that is, gold coast is a word with a more specific, narrower meaning than vicinity:

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

Other hyponyms of vicinity include place, proximity, scenery.

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