bank draft vs bill of exchange

bank draft and bill of exchange both are nouns.

Word	Noun	Adjective	Verb	Adverb
bank draft	Yes	No	No	No
bill of exchange	Yes	No	No	No

As nouns, bill of exchange is a hypernym of bank draft; that is, bill of exchange is a word with a broader meaning than bank draft:

bank draft: a draft drawn by a bank against funds deposited in another bank
bill of exchange: a document ordering the payment of money; drawn by one person or bank on another

Other hypernyms of bank draft include draft, order of payment.

bank draft (noun)	bill of exchange (noun)
a draft drawn by a bank against funds deposited in another bank	a document ordering the payment of money; drawn by one person or bank on another