Disillude is a rarely used word, which means to free someone from an illusion or false belief. However, there are several words that can be used as synonyms for disillude. One of the most common words that can be used as a synonym for disillude is disillusion. Other synonyms for disillude include enlighten, inform, educate, and reveal the truth. Disabuse, undeceive, and unmask are also good synonyms. Dissuade, set straight, and open someone's eyes are additional synonyms that are often used in place of disillude. Each of these words can be used to convey the meaning of freeing someone from a mistaken belief or falsehood.