loudness vs garishness

loudness and garishness both are nouns.

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

As nouns, loudness and garishness are synonyms defined as:

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

loudness (noun)	garishness (noun)
the magnitude of sound (usually in a specified direction)	tasteless showiness
tasteless showiness	strident color or excessive ornamentation