Onomatopoeia is when a word is used which demonstrates a sound. Probably one of the best examples of this form can be found throughout the comics where the action is captured by colorful "sound words" such as crash, boom, bang, crunch, kerplunk, zap, buzz.
The water gurgled down the drain.
The noisy chicken clucked her head off.
I cracked that dangerous whip.
We bashed the balloon filled with water.
The little kid slurped his soup.
You didn't cook that mush long enough.