melting pot vs environs

melting pot and environs both are nouns.

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

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

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

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

melting pot (noun)	environs (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	an outer adjacent area of any place