The term "rechristen" can be defined as the act of renaming something or someone, usually for a specific purpose or significance. There are several synonyms for this word, including "retitle," "relabel," and "rename." "Retitle" refers to changing the title or designation of something, while "relabel" is more commonly used for changing a product's label. "Rename" is the most general term that refers to the act of giving a new name to something. Other synonyms for "rechristen" include "rebrand," "recast," "reidentify," and "remodel." Each of these words has a slightly different connotation and can be used in different contexts, depending on the specific needs or objectives.