Onomatopoeia

Def:
The word used to describes the imitation of a sounds like "whack whack" "Ding Dong".
 Examples:

It's sort of whack, whir, wheeze, whine
Sputter, splat, squirt, scrape
Clink, clank, clunk, clatter
Crash, bang, beep, buzz
Ring, rip, roar, retch
Twang, toot, tinkle, thud
Pop, plop, plunk, pow
Snort, snuck, sniff, smack
Screech, splash, squish, squeak
Jingle, rattle, squeal, boing
Honk, hoot, hack, belch."

Significance:
Onomatopoeia are use in poems to describe the sounds of something descriptively, it also helps to make rhythm, music making.