brashness vs garishness

brashness and garishness both are nouns.

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

As nouns, brashness and garishness are synonyms defined as:

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

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