The definition of cacophonus is having a harsh or annoying sound.
The definition of dissonant is things that don't go well together or things that are not harmonious.
Unpleasant, uncomfortable, or hostile to survival:
Characterized or accompanied by shrill sounds
Find another word for ill-sounding. In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for ill-sounding, like: cacophonous, jangling, dissonant, harsh, loud, raucous and shrill.