go wrong vs fumble

go wrong is not a noun while fumble is a noun.

Word	Noun	Adjective	Verb	Adverb
go wrong	No	No	Yes	No
fumble	Yes	No	Yes	No

As verbs, fumble is a hyponym of go wrong; that is, fumble is a word with a more specific, narrower meaning than go wrong:

go wrong (noun)	fumble (noun)
	(sports) dropping the ball

go wrong (verb)	fumble (verb)
be unsuccessful	drop or juggle or fail to play cleanly a grounder
	feel about uncertainly or blindly
	handle clumsily
	make one's way clumsily or blindly
	make a mess of, destroy or ruin