nonpayment vs failure

nonpayment and failure both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonpayment	Yes	No	No	No
failure	Yes	No	No	No

As nouns, failure is a hypernym of nonpayment; that is, failure is a word with a broader meaning than nonpayment:

nonpayment (noun)	failure (noun)
the deliberate act of failing to pay money	an act that fails
loss resulting from failure of a debt to be paid	an unexpected omission
act of failing to meet a financial obligation	an event that does not accomplish its intended purpose
	a person with a record of failing; someone who loses consistently
	lack of success
	loss of ability to function normally
	inability to discharge all your debts as they come due