fluff vs bungle

fluff and bungle both are nouns.

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

As nouns, bungle is a hypernym of fluff; that is, bungle is a word with a broader meaning than fluff:

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

As verbs, fluff and bungle are synonyms defined as:

fluff (noun)	bungle (noun)
a blunder (especially an actor's forgetting the lines)	an embarrassing mistake
something of little value or significance
any light downy material

fluff (verb)	bungle (verb)
ruffle (one's hair) by combing the ends towards the scalp, for a full effect	spoil by behaving clumsily or foolishly
erect or fluff up	make a mess of, destroy or ruin
make a mess of, destroy or ruin