meretriciousness vs flashiness

meretriciousness and flashiness both are nouns.

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

As nouns, meretriciousness and flashiness are synonyms defined as:

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

meretriciousness (noun)	flashiness (noun)
an appearance of truth that is false or deceptive; seeming plausibility	tasteless showiness
tasteless showiness