organ-grinder vs promoter

organ-grinder and promoter both are nouns.

Word	Noun	Adjective	Verb	Adverb
organ-grinder	Yes	No	No	No
promoter	Yes	No	No	No

As nouns, promoter is a hypernym of organ-grinder; that is, promoter is a word with a broader meaning than organ-grinder:

Other hypernyms of organ-grinder include impresario, showman.

organ-grinder (noun)	promoter (noun)
a street musician who plays a hand organ or hurdy-gurdy	someone who is an active supporter and advocate
	a sponsor who books and stages public entertainments