Co-write is a term commonly used in writing circles to refer to the collaborative effort of two or more people in creating a written work. However, there are many synonyms for the word co-write that can be used in place of it. For example, "collaborate on," "jointly pen," "coauthor," "team-write" and "collaboratively produce." These words all convey the same idea of a partnership between two or more writers sharing responsibility for producing a written work. Choosing the right synonym depends on the context and the tone of the text, but they all help the writer communicate the idea of a joint effort to their audience.