advertizer vs promoter

advertizer and promoter both are nouns.

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

As nouns, promoter is a hyponym of advertizer; that is, promoter is a word with a more specific, narrower meaning than advertizer:

Other hyponyms of advertizer include huckster, booster, plugger, tout, touter.

advertizer (noun)	promoter (noun)
someone whose business is advertising	someone who is an active supporter and advocate
	a sponsor who books and stages public entertainments