frivolity vs bagatelle

frivolity and bagatelle both are nouns.

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

As nouns, frivolity and bagatelle are synonyms defined as:

Other synonyms of frivolity include fluff, frippery.

frivolity (noun)	bagatelle (noun)
acting like a clown or buffoon	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
the trait of being frivolous; not serious or sensible	a light piece of music for piano