ascendance

from WordNet (r) 3.0 (2006)

ascendance
    n 1: the state that exists when one person or group has power
         over another; "her apparent dominance of her husband was
         really her attempt to make him pay attention to her" [syn:
         {dominance}, {ascendance}, {ascendence}, {ascendancy},
         {ascendency}, {control}]

from The Collaborative International Dictionary of English v.0.48

Ascendancy \As*cend"an*cy\, Ascendance \As*cend"ance\, n.
   Same as {Ascendency}.
   [1913 Webster]