The word "rematerialize" refers to the process of appearing again after having disappeared or become invisible. Some synonyms for "rematerialize" include reappear, materialize again, resurface, and reemerge. Other options might be to say that something has returned, or that it has come back into existence, as though it had never really disappeared in the first place. In science fiction or fantasy writing, authors might use the term "reconstitute" to describe the process of an object or person appearing again after having been disintegrated or destroyed. Ultimately, there are many ways to express the concept of something reappearing, depending on the context and tone of the writing.