absonant
atonal
cacophonous
cracked
diaphonic
disconsonant
discordant
disharmonic
disharmonious
dissonant
flat
grating
harsh
immelodious
inharmonic
inharmonious
musicless
nonmelodious
off
off-key
off-tone
out of pitch
out of tone
out of tune
raucous
sharp
shrill
sour
strident
tuneless
unharmonious
unmusical
untunable
untuned
untuneful
adenoidal
blithesome
criminous
deep-drawn
half-conquered
jaw-breaking
megalomaniacal
milfhunter
overloud
salmon-fishing
stentorian
stertorous
sweet-toned
symphonious
tinny
tunable
undecorated
untuneable