business organization vs business concern

business organization and business concern both are nouns.

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

As nouns, business organization and business concern are synonyms defined as:

business organization and business concern: a commercial or industrial enterprise and the people who constitute it

Other synonyms of business organization include business, business organisation, concern.

business organization (noun)	business concern (noun)
a commercial or industrial enterprise and the people who constitute it	a commercial or industrial enterprise and the people who constitute it