Onomatopoeic word: Crunchy

Crispy foods are crunchy: potato chips, popcorn, pretzels, celery, carrots or lettuce. You usually can’t avoid making noise when you eat crunchy food.

The word crunchy sounds like the noise when you chew something crispy. You can also hear that noise when you walk on little stones, gravel, or broken glass and it makes a crunching sound under your feet. Crunch, crunch, crunch.