fumble vs boo-boo

fumble and boo-boo both are nouns.

Word	Noun	Adjective	Verb	Adverb
fumble	Yes	No	Yes	No
boo-boo	Yes	No	No	No

As nouns, boo-boo is a hypernym of fumble; that is, boo-boo is a word with a broader meaning than fumble:

Other hypernyms of fumble include bloomer, blooper, blunder, boner, botch, bungle, flub, foul-up, fuckup, pratfall.

fumble (noun)	boo-boo (noun)
(sports) dropping the ball	an embarrassing mistake

fumble (verb)	boo-boo (verb)
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