Clonk is a word used to describe a heavy or dull sound produced when two hard objects collide with each other. Some antonyms for the word clonk include words like tinkling, chiming or ringing which usually connote a lighter and more pleasant sound. Other antonyms include hush, silence, and quietness, as clonk implies loudness, noise, and impact. Cracking, snapping or popping also present antonyms for clonk as they usually suggest a sharper sound or a sudden break in something rather than a heavy impact. Finally, words like glide, flow or breeze can also act as antonyms to the word clonk, as these words suggest smooth and fluid motion rather than a jarring collision.