insolvency vs failure

insolvency and failure both are nouns.

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

As nouns, failure is a hyponym of insolvency; that is, failure is a word with a more specific, narrower meaning than insolvency:

Other hyponyms of insolvency include bankruptcy.

insolvency (noun)	failure (noun)
the lack of financial resources	an act that fails
	an unexpected omission
	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