soundness

nouns

a state or condition free from damage or decay
is derived from
is derived from
antonym
is a type of (narrower)
a state at a particular time
"a condition (or state) of disrepair"; "the current status of the arms negotiations"
the quality of being prudent and sensible
is derived from
is derived from
antonym
the muscle tone of healthy tissue
"his muscular firmness"
is derived from
antonym