One gas that begins with the letter "W" is "Wolfram gas," which is a term sometimes used to refer to tungsten hexafluoride (WF6). Tungsten hexafluoride is a chemical compound used in the semiconductor industry for depositing tungsten films during manufacturing processes. While not commonly encountered in everyday contexts, it is significant in specific industrial applications.
Animals beginning with W:WallabyWalrusWeaselWombatWarthogWaspWhaleWildebeestWolfWoodpeckerWren
A w-word is a euphemism for any avoidable word beginning with W.
V Vulture W Wolf
widow
Washington
The simplest colourless, flammable gas beginning with 'e', is 'ethane'.
Wolverine
water
WRX
Wisconsin
waratah?
A watch