Onomatopoeia
Etymology
From Greek onomatopoiía, "the making of a name or word," from ónoma ("name") + poieîn ("to make"). Literally "name-making," it named the practice of coining a word from a sound. Which sounds count is partly cultural — a dog’s "woof" in English is "wan-wan" in Japanese — but the sound-shaped impulse is universal.
noun · /on-uh-mat-uh-PEE-uh/
A word that imitates the sound of the thing it names — "buzz," "clang," "hiss."
What it names
The rare case where a word sounds like its meaning, letting language briefly stop describing a noise and simply make it.
Example
The comic panel was all onomatopoeia — a "SCREECH," a "CRUNCH," and then, mercifully, silence.
Related idea
Phonesthesia is the subtler cousin, where a sound cluster merely suggests a meaning (the "gl-" of "glitter," "gleam," "glow") without directly imitating a noise.