Technically, Fire is a chemical process, wherein Oxygen, a fuel, and heat trigger a quick, heat-releasing oxidative reaction that produces carbon dioxide and water vapor. This process is called Combustion. They're not called Combustionals, you know?An eye for an eye will make us all blind - Mahatma Ghandi.
Also Water is a molecule, Air is a bunch of different molecules, and don't let me get started on Earth.
(Sorry, I'm a Chemist, can't resist.)