WordNet sense 1 (an assembly (including one or more judges) to conduct judicial business):

court, tribunal

WordNet sense 2 (the system of law courts that administer justice and constitute the judicial branch of government):

judicatory, judiciary, judicial system

WordNet sense 3 (the administration of law; the act of determining rights and assigning rewards or punishments):

justice

WordNet sense 4 (the position of judge):

judgeship