merger vs integration

merger and integration both are nouns.

Word	Noun	Adjective	Verb	Adverb
merger	Yes	No	No	No
integration	Yes	No	No	No

As nouns, integration is a hypernym of merger; that is, integration is a word with a broader meaning than merger:

Other hypernyms of merger include consolidation.

merger (noun)	integration (noun)
the combination of two or more commercial companies	the action of incorporating a racial or religious group into a community
an occurrence that involves the production of a union	the act of combining into an integral whole
	an operation used in the calculus whereby the integral of a function is determined