WordNet (r) 3.0 (2006):

hubris
    n 1: overbearing pride or presumption

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "hubris":
   arrogance, assumption, assurance, assuredness, audacity, belief,
   boldness, brashness, brass, brazen boldness, bumptiousness,
   certitude, cheek, chutzpah, cocksureness, confidence,
   confidentness, contumely, conviction, courage, effrontery, faith,
   familiarity, gall, hardihood, heroics, imposition, improvidence,
   imprudence, impudence, indiscretion, injudiciousness, insolence,
   lawlessness, liberties, liberty abused, license, licentiousness,
   obtrusiveness, overboldness, overcarelessness, overconfidence,
   oversureness, overweening, overweeningness, poise, pomposity,
   positiveness, presumption, presumptuousness, pride, procacity,
   pushiness, rashness, security, self-assurance, self-confidence,
   self-importance, self-reliance, settled belief,
   subjective certainty, sureness, surety, temerariousness, temerity,
   trust, unchariness, undue liberty, unwariness, uppishness,
   uppityness