dud vs failure

dud and failure both are nouns.

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

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

Other hypernyms of dud include loser, nonstarter, unsuccessful person.

dud (noun)	failure (noun)
an event that fails badly or is totally ineffectual	an act that fails
an explosion that fails to occur	an unexpected omission
someone who is unsuccessful	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

dud (adjective)	failure (adjective)
failing to detonate; especially not charged with an active explosive