money dealer vs payer

money dealer and payer both are nouns.

Word	Noun	Adjective	Verb	Adverb
money dealer	Yes	No	No	No
payer	Yes	No	No	No

As nouns, payer is a hyponym of money dealer; that is, payer is a word with a more specific, narrower meaning than money dealer:

Other hyponyms of money dealer include banker, drawer, exchanger, money changer, remunerator, redeemer, financial officer, treasurer.

money dealer (noun)	payer (noun)
a person who receives or invests or pays out money	a person who pays money for something