robustness vs hardiness

robustness and hardiness both are nouns.

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

As nouns, robustness and hardiness are synonyms defined as:

robustness and hardiness: the property of being strong and healthy in constitution

Other synonyms of robustness include lustiness.

robustness (noun)	hardiness (noun)
the property of being strong and healthy in constitution	the property of being strong and healthy in constitution
the characteristic of being strong enough to withstand intellectual challenge	the trait of being willing to undertake things that involve risk or danger