misstep vs blunder

misstep and blunder both are nouns.

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

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

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

misstep (noun)	blunder (noun)
an unintentional but embarrassing blunder	an embarrassing mistake

misstep (verb)	blunder (verb)
	utter impulsively
	make one's way clumsily or blindly
	commit a faux pas or a fault or make a serious mistake