billing vs presentment

billing and presentment both are nouns.

Word	Noun	Adjective	Verb	Adverb
billing	Yes	No	No	No
presentment	Yes	No	No	No

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

billing (noun)	presentment (noun)
request for payment of a debt	an accusation of crime made by a grand jury on its own initiative
	a show or display; the act of presenting something to sight or view
	a document that must be accepted and paid by another person