bobble vs blunder

bobble and blunder both are nouns.

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

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

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

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

bobble (verb)	blunder (verb)
make a mess of, destroy or ruin	utter impulsively
	make one's way clumsily or blindly
	commit a faux pas or a fault or make a serious mistake