fail vs bungle

fail is not a noun while bungle is a noun.

Word	Noun	Adjective	Verb	Adverb
fail	No	No	Yes	No
bungle	Yes	No	Yes	No

As verbs, bungle is a hyponym of fail; that is, bungle is a word with a more specific, narrower meaning than fail:

fail (noun)	bungle (noun)
	an embarrassing mistake

fail (verb)	bungle (verb)
stop operating or functioning	spoil by behaving clumsily or foolishly
deteriorate	make a mess of, destroy or ruin
prove insufficient
disappoint, prove undependable to; abandon, forsake
become bankrupt or insolvent; fail financially and close
be unsuccessful
fail to get a passing grade
fail to do something; leave something undone
judge unacceptable
be unable
fall short in what is expected