The Collaborative International Dictionary of English v.0.48:

Insolence \In"so*lence\, n. [F. insolence, L. insolentia. See
   Insolent.]
   [1913 Webster]
   1. The quality of being unusual or novel. [Obs.] --Spenser.
      [1913 Webster]

   2. The quality of being insolent; pride or haughtiness
      manifested in contemptuous and overbearing treatment of
      others; arrogant contempt; brutal impudence.
      [1913 Webster]

            Flown with insolence and wine.        --Milton.
      [1913 Webster]

   3. Insolent conduct or treatment; insult.
      [1913 Webster]

            Loaded with fetters and insolences from the
            soldiers.                             --Fuller.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Insolence \In"so*lence\, v. t.
   To insult. [Obs.] --Eikon Basilike.
   [1913 Webster]

WordNet (r) 3.0 (2006):

insolence
    n 1: the trait of being rude and impertinent; inclined to take
         liberties [syn: crust, gall, impertinence,
         impudence, insolence, cheekiness, freshness]
    2: an offensive disrespectful impudent act

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "insolence":
   arrogance, assumption, audacity, bold front, boldness,
   brash bearing, brashness, brass, brassiness, bravado,
   brazen boldness, brazenness, bumptiousness, callousness, cheek,
   cheekiness, chutzpah, cockiness, contempt, contemptuousness,
   daring, daringness, defial, defiance, defying, derision, despite,
   discourtesy, disdain, disesteem, dishonor, disparagement,
   disregard, disrespect, disrespectfulness, gall, hardihood,
   hardness, hardness of heart, heart of stone, heroics, hubris,
   impenitence, impenitentness, impertinence, improvidence,
   imprudence, impudence, indiscretion, induration, injudiciousness,
   irrepentance, irreverence, lack of respect, nonrepentance,
   obduracy, overboldness, overcarelessness, overconfidence,
   oversureness, overweening, overweeningness, pertness, presumption,
   presumptuousness, rashness, ridicule, rudeness, sauciness,
   seared conscience, temerariousness, temerity, unabjectness,
   unchariness, uncontriteness, unwariness