shamelessness vs brazenness

shamelessness and brazenness both are nouns.

Word	Noun	Adjective	Verb	Adverb
shamelessness	Yes	No	No	No
brazenness	Yes	No	No	No

As nouns, shamelessness and brazenness are synonyms defined as:

shamelessness and brazenness: behavior marked by a bold defiance of the proprieties and lack of shame

shamelessness (noun)	brazenness (noun)
behavior marked by a bold defiance of the proprieties and lack of shame	behavior marked by a bold defiance of the proprieties and lack of shame