reign

reign (http://definr.com/reign)

     n 1: a period during which something or somebody is dominant or
          powerful; "he was helpless under the reign of his
          egotism"
     2: the period during which a monarch is sovereign; "during the
        reign of Henry VIII"
     3: royal authority; the dominion of a monarch [syn: sovereignty]
     v 1: have sovereign power; "Henry VIII reigned for a long time"
     2: be larger in number, quantity, or importance; "Money reigns
        supreme here"; "Hispanics predominate in this
        neighborhood" [syn: predominate, dominate, rule, prevail]