muff vs fluff

muff and fluff both are nouns.

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

As verbs, muff and fluff are synonyms defined as:

muff (noun)	fluff (noun)
(sports) dropping the ball	a blunder (especially an actor's forgetting the lines)
a warm tubular covering for the hands	something of little value or significance
	any light downy material

muff (verb)	fluff (verb)
make a mess of, destroy or ruin	ruffle (one's hair) by combing the ends towards the scalp, for a full effect
fail to catch, as of a ball	erect or fluff up
	make a mess of, destroy or ruin