The word robustness has one meaning. The definition of this word is, "the property of being strong and healthy in constitution." This word is an add on from the word 'robust.'

Being very strong and excellent health.

Robustness has been defined by the Food and Drug Administration as "the degree to which a software system or component can function correctly in the presence of invalid inputs or stressful environmental conditions."

Fettle, robustness, vigor, trim, good condition...

Security

Robustness

Performance

Scalability

Management