bobble vs flub

bobble and flub both are nouns.

Word	Noun	Adjective	Verb	Adverb
bobble	Yes	No	Yes	No
flub	Yes	No	Yes	No

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

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

As verbs, bobble and flub are synonyms defined as:

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

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