The Collaborative International Dictionary of English v.0.48:

Supereminence \Su`per*em"i*nence\, Supereminency
\Su`per*em"i*nen*cy\, n. [L. supereminentia.]
   The quality or state of being supereminent; distinguished
   eminence; as, the supereminence of Cicero as an orator, or
   Lord Chatham as a statesman. --Ayliffe.
   [1913 Webster]

         He was not forever beset with the consciousness of his
         own supereminence.                       --Prof.
                                                  Wilson.
   [1913 Webster]