The term "metallic" is often used to describe sounds that have a harsh, clanging, or resonating quality that is reminiscent of metal. Some synonyms for "metallic sound" might include clang, clank, rattle, jangle, or chime. These words all evoke the sharp, crisp, and often sharp-edged sound that is characteristic of metal objects rattling against each other. Other possible synonyms might include ting, ping, or ring, which suggest a high-pitched or ringing quality to the sound. Whatever word one chooses, the important thing is to be descriptive and accurate in conveying the tone, timbre, and character of the sound being described.