There are several antonyms for the word "dis-believes," which means to not believe or have doubts. One antonym is "believes," which means to have faith or confidence in something. Another antonym is "trusts," which means to have confidence in the reliability or truth of something. "Accepts" is also an antonym and means to acknowledge the truth or existence of something. "Agrees" is an antonym that means to share the same opinion or belief with someone else. Lastly, "confides" is another antonym that means to trust or rely on someone's honesty or sincerity. These words can be used to express beliefs, confidence, acceptance, agreement, and trust, which are the opposite of dis-belief.