cost ledger vs leger

cost ledger and leger both are nouns.

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

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

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

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

cost ledger (noun)	leger (noun)
ledger showing the accumulated costs classified in various ways	a record in which commercial accounts are recorded