fluff vs bagatelle

fluff and bagatelle both are nouns.

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

As nouns, fluff and bagatelle are synonyms defined as:

Other synonyms of fluff include frippery, frivolity.

fluff (noun)	bagatelle (noun)
a blunder (especially an actor's forgetting the lines)	a table game in which short cues are used to knock balls into holes that are guarded by wooden pegs; penalties are incurred if the pegs are knocked over
something of little value or significance	something of little value or significance
any light downy material	a light piece of music for piano

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