payable vs indebtedness

payable and indebtedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
payable	Yes	Yes	No	No
indebtedness	Yes	No	No	No

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

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

Other hypernyms of payable include financial obligation, liability.

payable (noun)	indebtedness (noun)
a liability account showing how much is owed for goods and services purchased on credit	a personal relation in which one is indebted for a service or favor
	an obligation to pay money to another party

payable (adjective)	indebtedness (adjective)
subject to or requiring payment especially as specified