default vs nonpayment

default and nonpayment both are nouns.

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

As nouns, default and nonpayment are synonyms defined as:

default and nonpayment: loss resulting from failure of a debt to be paid

Other synonyms of default include nonremittal.

As nouns, default and nonpayment are synonyms defined as:

Other synonyms of default include nonremittal.

default (noun)	nonpayment (noun)
loss due to not showing up	the deliberate act of failing to pay money
an option that is selected automatically unless an alternative is specified	loss resulting from failure of a debt to be paid
loss resulting from failure of a debt to be paid	act of failing to meet a financial obligation
act of failing to meet a financial obligation

default (verb)	nonpayment (verb)
fail to pay up