business leader vs baron

business leader and baron both are nouns.

Word	Noun	Adjective	Verb	Adverb
business leader	Yes	No	No	No
baron	Yes	No	No	No

As nouns, business leader and baron are synonyms defined as:

Other synonyms of business leader include big businessman, king, magnate, mogul, power, top executive, tycoon.

business leader (noun)	baron (noun)
a very wealthy or powerful businessman	a British peer of the lowest rank
	a very wealthy or powerful businessman
	a nobleman (in various countries) of varying rank