failure vs bank failure

failure and bank failure both are nouns.

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

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

Other hyponyms of failure include bankruptcy, crop failure, dead duck.

failure (noun)	bank failure (noun)
an act that fails	the inability of a bank to meet its credit obligations
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