business organisation vs business concern

business organisation and business concern both are nouns.

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

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

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

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

business organisation (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