Synonyms and related words :
absonant, acute, argute, atonal, cacophonous, caterwaul, cracked, creak, creaky, diaphonic, disconsonant, discordant, disharmonic, disharmonious, dissonant, ear-piercing, ear-splitting, flat, grating, harsh, high, high-pitched, howl, howling, immelodious, inharmonic, inharmonious, keen, keening, musicless, nonmelodious, off, off-key, off-tone, out of pitch, out of tone, out of tune, penetrating, piercing, pipe, piping, raucous, reedy, screak, screaky, scream, screech, screeching, screechy, sharp, shriek, shrieking, shrieky, skirl, skreigh, sour, squawk, squeak, squeaking, squeaky, squeal, strident, thin, treble, tuneless, ululant, ululation, unharmonious, unmelodious, unmusical, untunable, untuned, untuneful, wail, wailing, whine, whining, whistle, whistling, yammer