blunder vs muff

blunder and muff both are nouns.

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

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

blunder (noun)	muff (noun)
an embarrassing mistake	(sports) dropping the ball
	a warm tubular covering for the hands

blunder (verb)	muff (verb)
utter impulsively	make a mess of, destroy or ruin
make one's way clumsily or blindly	fail to catch, as of a ball
commit a faux pas or a fault or make a serious mistake