Nonauthor is a word that refers to someone who is not an author or writer. Antonyms of nonauthor, therefore, will be words that describe someone who is an author, writer or someone who is involved in writing or publishing. These antonyms include novelist, poet, playwright, editor, critic, journalist, reporter, essayist, screenwriter, biographer, historian, and copywriter. These terms describe people who are involved in creating written works of fiction, non-fiction, news or other forms of written content. They are skilled in writing, editing or publishing and are recognized for their expertise in their respective fields.