The Collaborative International Dictionary of English v.0.48:

Ugliness \Ug"li*ness\, n.
   The quality or state of being ugly.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ugliness
    n 1: qualities of appearance that do not give pleasure to the
         senses [ant: beauty]
    2: the quality of being wicked [syn: nefariousness,
       wickedness, vileness, ugliness]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "ugliness":
   bearishness, bitchiness, cacophony, cantankerousness, churlishness,
   coarseness, crabbedness, cracked voice, crankiness, crossness,
   crustiness, cussedness, disagreeability, disagreeableness, discord,
   displeasingness, displeasure, distastefulness, dryness,
   excitability, fractiousness, gruffness, gutturalism, gutturality,
   gutturalness, harshness, hoarseness, huffiness, huffishness,
   huskiness, irascibility, irritability, meanness, orneriness,
   perversity, raspiness, raucity, roughness, rudeness, scrapiness,
   scratchiness, snappishness, stertorousness, testiness, thickness,
   throatiness, unappealingness, unattractiveness, undelectability,
   undesirability, unpalatability, unpleasantness, unpleasingness,
   unsavoriness, waspishness



The Devil's Dictionary (1881-1906):

UGLINESS, n.  A gift of the gods to certain women, entailing virtue
without humility.