melting pot vs surround

melting pot and surround both are nouns.

Word	Noun	Adjective	Verb	Adverb
melting pot	Yes	No	No	No
surround	Yes	No	Yes	No

As nouns, surround is a hypernym of melting pot; that is, surround is a word with a broader meaning than melting pot:

melting pot: an environment in which many ideas and races are socially assimilated
surround: the area in which something exists or lives

Other hypernyms of melting pot include environment, environs, surroundings.

melting pot (noun)	surround (noun)
a vessel made of material that does not melt easily; used for high temperature chemical reactions	the area in which something exists or lives
an environment in which many ideas and races are socially assimilated

melting pot (verb)	surround (verb)
	surround so as to force to give up
	surround with a wall in order to fortify
	extend on all sides of simultaneously; encircle
	envelop completely