The Collaborative International Dictionary of English v.0.48:

Haughtiness \Haugh"ti*ness\, n. [For hauteinness. See
   Haughty.]
   The quality of being haughty; disdain; arrogance.

   Syn: Arrogance; disdain; contemptuousness; superciliousness;
        loftiness.

   Usage: Haughtiness, Arrogance, Disdain. Haughtiness
          denotes the expression of conscious and proud
          superiority; arrogance is a disposition to claim for
          one's self more than is justly due, and enforce it to
          the utmost; disdain in the exact reverse of
          condescension toward inferiors, since it expresses and
          desires others to feel how far below ourselves we
          consider them. A person is haughty in disposition and
          demeanor; arrogant in his claims of homage and
          deference; disdainful even in accepting the deference
          which his haughtiness leads him arrogantly to exact.
          [1913 Webster]

WordNet (r) 3.0 (2006):

haughtiness
    n 1: overbearing pride evidenced by a superior manner toward
         inferiors [syn: arrogance, haughtiness, hauteur,
         high-handedness, lordliness]