The antonyms for the word "more ill-sounding" can vary depending on the context in which it is used. However, here are some possible antonyms that may apply: melodious, harmonious, pleasant, musical, sweet-sounding, tuneful, agreeable, soothing, gentle, and euphonious. These words are suitable alternatives to describe sounds that are pleasing to the ear, calm, or balanced. On the other hand, "ill-sounding" suggests an unpleasant, discordant, or jarring noise that can be a source of discomfort, annoyance or disturbance. Therefore, using antonyms such as those mentioned above can help convey a different meaning and tone to the text, depending on the intended effect.