writer vs joint author

Other hyponyms of writer include abstracter, abstractor, alliterator, authoress, biographer, coauthor, commentator, reviewer, compiler, contributor, cyberpunk, drafter, dramatist, playwright, essayist, litterateur, folk writer, framer, gagman, gagster, gagwriter, ghost, ghostwriter, Gothic romancer, hack, hack writer, literary hack, journalist, librettist, lyricist, lyrist, novelist, pamphleteer, paragrapher, poet, polemic, polemicist, polemist, poetiser, poetizer, rhymer, rhymester, versifier, scenarist, scriptwriter, space writer, speechwriter, tragedian, wordmonger, word-painter, wordsmith.