Deceit : the action or practice of deceiving someone by concealing or misrepresenting the truth.Reality : the state of things as they actually exist, as opposed to an idealistic or notional idea of them.Trust : firm belief in the reliability, truth, or ability of someone or something.Truthfulness : the fact of being true; truth.Fact : a thing that is known or proved to be true.Antonym of Deceit is Truthfulness