brashness vs meretriciousness

brashness and meretriciousness both are nouns.

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

As nouns, brashness and meretriciousness are synonyms defined as:

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

brashness (noun)	meretriciousness (noun)
the trait of being rash and hasty	an appearance of truth that is false or deceptive; seeming plausibility
tasteless showiness	tasteless showiness