brazenness vs hardihood

brazenness and hardihood both are nouns.

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

As nouns, hardihood is a hypernym of brazenness; that is, hardihood is a word with a broader meaning than brazenness:

brazenness: behavior marked by a bold defiance of the proprieties and lack of shame
hardihood: the trait of being willing to undertake things that involve risk or danger

Other hypernyms of brazenness include boldness, daring, hardiness.

brazenness (noun)	hardihood (noun)
behavior marked by a bold defiance of the proprieties and lack of shame	the trait of being willing to undertake things that involve risk or danger