garishness vs loudness

garishness and loudness both are nouns.

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

As nouns, garishness and loudness are synonyms defined as:

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

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