gaudiness vs brashness

gaudiness and brashness both are nouns.

Word	Noun	Adjective	Verb	Adverb
gaudiness	Yes	No	No	No
brashness	Yes	No	No	No

As nouns, gaudiness and brashness are synonyms defined as:

Other synonyms of gaudiness include flashiness, garishness, glitz, loudness, meretriciousness, tawdriness.

gaudiness (noun)	brashness (noun)
strident color or excessive ornamentation	the trait of being rash and hasty
tasteless showiness	tasteless showiness