soundness

noun

1.
a state or condition free from damage or decay
Antonym:
unsoundness
Derived from:
sound
2.
the quality of being prudent and sensible
glewness snitter wisehood wisdom wiseness
Antonym:
unsoundness
Derived from:
sound
3.
the muscle tone of healthy tissue
firmness
Antonym:
unsoundness
Derived from:
sound