Hubris

Noun

 * 1) Excessive pride, presumption or arrogance (originally toward the gods).
 * 2) Unchecked arrogance

Synonyms for Hubris
arrogance, insolence, pride, haughtiness, lordliness, conceit, egotism, vanity, self-importance.

Antonyms for Hubris
humility, lowliness, abasement, simplicity,  reserve,  restraint,  self-deprecation.

Thesaurus
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