I'm reminded of the word de-plane, which replaced the perfectly serviceable disembark as the term of choice for telling passengers to get out. This happened shortly after the TSA took over and is a depressing reminder of such.
At some point also post-TSA, they started referring to us as "customers" instead of "passengers", which is similarly irritating and unnecessary. It's also less accurate, since I am always a passenger when I fly, but often not a customer, since someone else (perhaps an employer) purchased the ticket I'm flying under.
Another "plane word" is lavatory. While this is certainly an English word for a bathroom, I don't think I've ever heard it outside the context of an airplane.
