A gas grill is the go-to choice for many when it comes to outdoor cooking, but did you know there are many synonyms for this popular appliance? A propane grill is another name for a gas grill, as propane is the most commonly used fuel for these appliances. A natural gas grill is powered by gas from a home or building's gas line, rather than a propane tank. A barbeque grill is another term sometimes used to describe a gas grill, although a barbeque can technically be any method of cooking over an open flame. Additionally, a gas griddle, which is a flat-top grill that uses gas as its heat source, is sometimes referred to as a gas grill.