what is another word for gas?

Another word for "gas" can vary depending on the context, but common synonyms include vapor, fumes, gasoline, fuel, petrol (British), propane, methane, and flatulence. In informal speech, "gas" can also mean energy or strength, with synonyms like pep or zest. For the gaseous state of matter, synonyms include vapor and aeriform fluid. For fuel-related contexts, gasoline, petrol, and fuel are often used interchangeably.