IPA: /nɒnˈkɒmpəʊzə/
KK: /nɑnˈkɒmpoʊzər/
A person who does not create or write music.
Although she loves music, she considers herself a noncomposer.
Noncomposer → It is formed from "non-" (meaning not) and "composer" (from Latin "componere", meaning to put together). The word "noncomposer" refers to someone who does not put together or create music or compositions.
Think of 'not' ('non-') being used to describe someone who does not 'put together' ('composer') music — that's why a noncomposer is someone who does not create music.