hardiness vs boldness

hardiness and boldness both are nouns.

Word	Noun	Adjective	Verb	Adverb
hardiness	Yes	No	No	No
boldness	Yes	No	No	No

As nouns, hardiness and boldness are synonyms defined as:

hardiness and boldness: the trait of being willing to undertake things that involve risk or danger

Other synonyms of hardiness include daring, hardihood.

hardiness (noun)	boldness (noun)
the property of being strong and healthy in constitution	the trait of being willing to undertake things that involve risk or danger
the trait of being willing to undertake things that involve risk or danger	the quality of standing out strongly and distinctly
	impudent aggressiveness