Assumption. Presumption, hypothesis, theory, postulate, conjecture; acceptance of, responsibility for; usurpation, arrogance, haughtiness, conceit, lordliness, impudence, effrontery.
Ant. Truth, fact; timidity, distrust, misgiving, consternation.
Assurance. Confidence, effrontery, presumption, assumption, arrogance, impudence, self-reliance, boldness, assertion; pledge.
Ant. Doubt, distrust, hesitancy, misgiving, timidity, confusion, dismay, shyness.
Astonish. Amaze, startle, surprise, astound, stupefy, stagger.
Ant. Encourage, embolden, assure.
Astute. Keen, discerning, acute, sagacious, shrewd, sharp, cunning, subtle, discriminating, knowing, perspicacious, crafty.
Ant. Stupid, unintelligent, imbecile, dull, idiotic, shortsighted, shallow.
Atrocious. Infamous, outrageous, nefarious, villainous, diabolical, heinous, flagrant, horrible.
Ant. Humane, noble, honorable, admirable, chivalrous, generous.