1) Cacophonous 2) Dissonant 3) Lacking melody 4) Nonmusical 5) Not musical 6) Not musical in nature 7) Strident 1) Discordant 2) Dissonant 3) Monotonous 4) Nonmusical 5) Tuneless 6) Unmelodic 
[adj] - lacking interest in or talent for music 2. [adj] - not musical in nature
not musical; deficient in melody, harmony, rhythm, or tone. · acoustically and aesthetically harsh on the ear; strident; dissonant; cacophonous. · not fond of or skilled in music.