Worthiness, n.
The quality or state of being worthy; desert; merit; excellence; dignity; virtue; worth. Who is sure he hath a soul, unless It see, and judge, and follow worthiness Donne. She is not worthy to be loved that hath not some feeling of her own worthiness. Sir P. Sidney. The prayers which our Savior made were for his own worthiness accepted. Hooker.
Shades of meaning
Fernald has no entry of its own for worthiness; he lists it under virtue.
He lists it without comment; the entries above explain its neighbors.