melting pot vs environment

melting pot and environment both are nouns.

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

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

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

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

melting pot (noun)	environment (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	the totality of surrounding conditions