business concern vs enterprise

business concern and enterprise both are nouns.

Word	Noun	Adjective	Verb	Adverb
business concern	Yes	No	No	No
enterprise	Yes	No	No	No

As nouns, enterprise is a hypernym of business concern; that is, enterprise is a word with a broader meaning than business concern:

business concern: a commercial or industrial enterprise and the people who constitute it
enterprise: an organization created for business ventures

business concern (noun)	enterprise (noun)
a commercial or industrial enterprise and the people who constitute it	a purposeful or industrious undertaking (especially one that requires effort or boldness)
	readiness to embark on bold new ventures
	an organization created for business ventures