According to today's Washington Post, three of the 25 Fairfax, Va., public high schools "have turf" football fields. The story quotes someone who says, "I see turf fields as being an improvement on Mother Nature."
I know saying artificial turf is a mouthful, but shortening it to just turf conveys the opposite meaning.
Turf means grass. Unfortunately, it also means fake grass.
We need a word that doesn't convey its exact opposite meaning.