businesspeople vs business people

businesspeople and business people both are nouns.

Word	Noun	Adjective	Verb	Adverb
businesspeople	Yes	No	No	No
business people	Yes	No	No	No

As nouns, businesspeople and business people are synonyms defined as:

businesspeople and business people: people who transact business (especially business executives)

businesspeople (noun)	business people (noun)
people who transact business (especially business executives)	people who transact business (especially business executives)