Original: Chili pepper (also known as, or spelled, chilli pepper, chilli, chillie, chili, and chile) is the fruit of the plants from the genus Capsicum, members of the nightshade family, Solanaceae.
Simplified: Chile pepper (also spelled Chili pepper, Chilli pepper; often shortened to chile, sometimes called Pepperoni) is the fruit of a series of plants called Capsicum (nightshade family).