tycoon vs business leader

tycoon and business leader both are nouns.

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

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

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

tycoon (noun)	business leader (noun)
a very wealthy or powerful businessman	a very wealthy or powerful businessman