Illusorily refers to something that appears to be true but is actually false or misleading. There are several synonyms for this word that can help to express the same idea in different ways. Some possible synonyms for illusorily include falsely, deceptively, delusively, fictitiously, and misleadingly. These words all carry a similar meaning to illusorily and can be useful when trying to convey a sense of something that seems real or true but is actually an illusion. Using synonyms can help to add variety and nuance to your writing, making it more interesting and engaging for your readers.