overdraft vs bill of exchange

overdraft and bill of exchange both are nouns.

Word	Noun	Adjective	Verb	Adverb
overdraft	Yes	No	No	No
bill of exchange	Yes	No	No	No

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

overdraft: a draft in excess of the credit balance
bill of exchange: a document ordering the payment of money; drawn by one person or bank on another

Other hypernyms of overdraft include draft, order of payment.

overdraft (noun)	bill of exchange (noun)
a draft in excess of the credit balance	a document ordering the payment of money; drawn by one person or bank on another