sight bill vs order of payment

sight bill and order of payment both are nouns.

Word	Noun	Adjective	Verb	Adverb
sight bill	Yes	No	No	No
order of payment	Yes	No	No	No

As nouns, order of payment is a hypernym of sight bill; that is, order of payment is a word with a broader meaning than sight bill:

sight bill: a draft payable on presentation
order of payment: a document ordering the payment of money; drawn by one person or bank on another

Other hypernyms of sight bill include bill of exchange, draft.

sight bill (noun)	order of payment (noun)
a draft payable on presentation	a document ordering the payment of money; drawn by one person or bank on another