Antonyms of truth:
false statement, falsehood, falseness, falsity, inaccuracy, untruth, dishonesty, inequity, partiality, unlawfulness, favoritism, injustice, unfairness, unreasonableness, wrong, erroneousness, fallaciousness, fallacy, fiction, half-truth, lie, impreciseness, imprecision, incorrectness, inexactitude, inexactness, deceit, equivocation, lying, mendaciousness, mendacity, prevarication, untruthfulness.
Examples of usage:
  1. Oh, why was I not told the truth?
    "East of the Shadows", Mrs. Hubert Barclay.
  2. And then I opened the door, and she came in, and begged me to tell just the whole truth.
    "Christina", L. G. Moberly.
  3. They really didn't give us a chance- that's the truth.
    "The Dwelling Place of Light, Complete", Winston Churchill Last Updated: March 5, 2009.