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:
Oh, why was I not told the truth? "East of the Shadows", Mrs. Hubert Barclay.
And then I opened the door, and she came in, and begged me to tell just the whole truth. "Christina", L. G. Moberly.
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.