What is onomatopoeia?

Onomatopoeia is when
1. a word sounds like the sound it is trying to describe
2. a new word is formed based on the sound with which it is associated

Examples of onomatopoeia

1. Words that sound like sounds

Sheep baa, cattle moo, horses neigh, and pigs go oink. (baa, moo, neigh, oink)
The water fell into the sink with a drip-drop. (drip-drop)
The bees buzzed around the field. (buzz)
The ding-dong of Big Ben rang out over London. (ding-dong)

2. Common words based on associated sounds

Some cuckoos lay their eggs in the nests of other birds. (cuckoo)
The teacher put a whoopee cushion on his chair. (whoopee cushion)
He thumped the teacher in the face. (thump)
She was angry so she popped my balloon. (pop)

Exercises

Think of new onomatopoeia to describe the sound of:

a) rain
b) a hungry stomach
c) a computer starting
d) a volcano