bobble vs boo-boo

bobble and boo-boo both are nouns.

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

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

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

bobble (noun)	boo-boo (noun)
the momentary juggling of a batted or thrown baseball	an embarrassing mistake

bobble (verb)	boo-boo (verb)
make a mess of, destroy or ruin