loser vs failure

loser and failure both are nouns.

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

As nouns, loser and failure are synonyms defined as:

loser and failure: a person with a record of failing; someone who loses consistently

Other synonyms of loser include nonstarter, unsuccessful person.

loser (noun)	failure (noun)
a gambler who loses a bet	an act that fails
a contestant who loses the contest	an unexpected omission
a person with a record of failing; someone who loses consistently	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