blunder vs bobble

blunder and bobble both are nouns.

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

As nouns, bobble is a hyponym of blunder; that is, bobble is a word with a more specific, narrower meaning than blunder:

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

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