Onomatopoeia

Onomatopoeia is the use of words that imitate sounds. These include words like hiss, murmur, clash or crunch. Onomatopoeia is often used in poetry to create images from sounds. Consider these lines from Tennyson:
The moan of Doves in immemorial elms and murmuring of innumerable bees.

It can be great fun teaching about onomatopoeia.