flub vs blunder

flub and blunder both are nouns.

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

As nouns, flub and blunder are synonyms defined as:

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

flub (noun)	blunder (noun)
an embarrassing mistake	an embarrassing mistake

flub (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