Prowess is a related term of robustness.
As nouns the difference between prowess and robustness
is that prowess is skillfulness and manual ability; adroitness or dexterity while robustness is the quality of being robust.
prowess
English
Noun
Skillfulness and manual ability; adroitness or dexterity.
Distinguished bravery or courage, especially in battle; heroism
References
* The Oxford Paperback Dictionary fourth edition ISBN 0-19-280012-4
robustness
English
Noun
(-)
The quality of being robust.