The Collaborative International Dictionary of English v.0.48:

Stalworthhood \Stal"worth*hood\ (-w[~e]rth*h[oo^]d),
Stalworthness \Stal"worth*ness\ (-w[~e]rth*n[e^]s), n.
   The quality or state of being stalworth; stalwartness;
   boldness; daring. [Obs.]
   [1913 Webster]