The word "evolver" primarily refers to something that is capable of evolving or undergoing evolutionary changes. However, there are some synonyms that can be used interchangeably for this term. These include "developer," which denotes someone or something that develops or progresses over time. "Advancer" is another synonym that points to someone or something that is moving forward or making progress. "Permutator" refers to something that is altering or changing over time. Similarly, "transformer" and "metamorphoser" are terms used to describe something that undergoes a significant change or transformation. Overall, these synonyms highlight the various ways in which things can evolve or change over time.