loss vs failure

loss and failure both are nouns.

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

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

loss (noun)	failure (noun)
the act of losing someone or something	an act that fails
the disadvantage that results from losing something	an unexpected omission
military personnel lost by death or capture	an event that does not accomplish its intended purpose
the experience of losing a loved one	a person with a record of failing; someone who loses consistently
euphemistic expressions for death	lack of success
the amount by which the cost of a business exceeds its revenue	loss of ability to function normally
something that is lost	inability to discharge all your debts as they come due
gradual decline in amount or activity