failure vs reverting

failure and reverting both are nouns.

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

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

failure (noun)	reverting (noun)
an act that fails	a failure to maintain a higher state
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

failure (adjective)	reverting (adjective)
	tending to return to an earlier state