crucible vs melting pot

crucible and melting pot both are nouns.

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

As nouns, crucible and melting pot are synonyms defined as:

crucible and melting pot: a vessel made of material that does not melt easily; used for high temperature chemical reactions

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