Source : Webster's Revised Unabridged Dictionary (1913)

Staunch \Staunch\, Staunchly \Staunch"ly\, Staunchness
\Staunch"ness\, etc.
   See {Stanch}, {Stanchly}, etc.

Source : WordNet®

staunchness
     n : loyalty in the face of trouble and difficulty [syn: {steadfastness}]