cost ledger vs ledger

cost ledger and ledger both are nouns.

Word	Noun	Adjective	Verb	Adverb
cost ledger	Yes	No	No	No
ledger	Yes	No	No	No

As nouns, ledger is a hypernym of cost ledger; that is, ledger is a word with a broader meaning than cost ledger:

cost ledger: ledger showing the accumulated costs classified in various ways
ledger: a record in which commercial accounts are recorded

Other hypernyms of cost ledger include account book, book, book of account, leger.

cost ledger (noun)	ledger (noun)
ledger showing the accumulated costs classified in various ways	an accounting journal as a physical object
	a record in which commercial accounts are recorded