princedom

from WordNet (r) 3.0 (2006)

princedom
    n 1: the dignity or rank or position of a prince
    2: territory ruled by a prince [syn: {principality},
       {princedom}]

from The Collaborative International Dictionary of English v.0.48

Princedom \Prince"dom\, n.
   The jurisdiction, sovereignty, rank, or estate of a prince.
   [1913 Webster]

         Thrones, princedoms, powers, dominions, I reduce.
                                                  --Milton.
   [1913 Webster]