gas

Gas has 1 syllable.

noun. A fossil fuel in the gaseous state; used for cooking and heating homes.

noun. A volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines.

noun. A state of excessive gas in the alimentary canal.

noun. The state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container.