account payable vs liability

account payable and liability both are nouns.

Word	Noun	Adjective	Verb	Adverb
account payable	Yes	No	No	No
liability	Yes	No	No	No

As nouns, liability is a hypernym of account payable; that is, liability is a word with a broader meaning than account payable:

account payable: a liability account showing how much is owed for goods and services purchased on credit
liability: an obligation to pay money to another party

Other hypernyms of account payable include financial obligation, indebtedness.

account payable (noun)	liability (noun)
a liability account showing how much is owed for goods and services purchased on credit	the quality of being something that holds you back
	an obligation to pay money to another party
	the state of being legally obliged and responsible