shipbuilder vs business concern

shipbuilder and business concern both are nouns.

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

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

shipbuilder: a business that builds and repairs ships
business concern: a commercial or industrial enterprise and the people who constitute it

Other hypernyms of shipbuilder include business, business organisation, business organization, concern.

shipbuilder (noun)	business concern (noun)
a business that builds and repairs ships	a commercial or industrial enterprise and the people who constitute it
a person who builds ships as a business
a carpenter who helps build and launch wooden vessels