cocomposer

noun

co·​com·​pos·​er ˌkō-kəm-ˈpō-zər 

variants or co-composer

plural cocomposers or co-composers

: one who collaborates with another person in composing something (such as a piece of music)

… he might eventually find himself in the running for an Oscar, as well, thanks to his role as a co-composer in Disney's Moana, the South Pacific-set animated musical …

—Brian Raferty

Word History

First Known Use

1902, in the meaning defined above