payer vs paymaster

payer and paymaster both are nouns.

Word	Noun	Adjective	Verb	Adverb
payer	Yes	No	No	No
paymaster	Yes	No	No	No

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

Other hyponyms of payer include drawee, taxpayer, renter, tenant, tither.

payer (noun)	paymaster (noun)
a person who pays money for something	a person in charge of paying wages