WordNet (r) 3.0 (2006):

eminent domain
    n 1: the right of the state to take private property for public
         use; the Fifth Amendment that was added to the Constitution
         of the United States requires that just compensation be
         made

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "eminent domain":
   angary, annexation, annexure, ascendance, ascendancy, attachment,
   balance of power, collectivization, commandeering, communalization,
   communization, confiscation, distraint, distress, dominance,
   dominancy, domination, dominion, execution, expropriation,
   garnishment, impoundment, impressment, levy, nationalization,
   overlordship, predominance, predominancy, predomination,
   preeminence, preponderance, prepotence, prepotency, primacy,
   principality, right of angary, sequestration, socialization,
   sovereignty, superiority, supremacy, suzerainship, suzerainty,
   upper hand, whip hand