promoter vs impresario

promoter and impresario both are nouns.

Word	Noun	Adjective	Verb	Adverb
promoter	Yes	No	No	No
impresario	Yes	No	No	No

As nouns, promoter and impresario are synonyms defined as:

promoter and impresario: a sponsor who books and stages public entertainments

Other synonyms of promoter include showman.

promoter (noun)	impresario (noun)
someone who is an active supporter and advocate	a sponsor who books and stages public entertainments
a sponsor who books and stages public entertainments