1) Deficient in melody 2) Lacking a melody 3) Lacking melodic 4) Making or giving no music 5) Not melodic 6) Not melodious 7) Unmelodious 8) Unmusical 9) Untuneful Found on https://www.crosswordclues.com/clue/tuneless
• (a.) Not expressed in music or poetry; unsung. • (a.) Not employed in making music; as, tuneless harps. • (a.) Without tune; inharmonious; unmusical. Found on http://thinkexist.com/dictionary/meaning/tuneless/