garishness vs brashness

garishness and brashness both are nouns.

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

As nouns, garishness and brashness are synonyms defined as:

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

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