Pipe-Dream is a 10 letter English word. It's valid Scrabble word worth 8 points. It's valid Words with friends word worth 10 points.
You can make 350 anagrams from letters in pipe-dream (-adeeimppr).
An Americanism dating back to 1895-1900
But how among countless suggestions is a "cause" to know the difference between a true invention and a pipe-dream?
The notion that the trombonist had given a signal he derided as an "Old Sleuth pipe-dream."
"Go ahead and have a good time with your pipe-dream, Abe," Morris said.
I have been trying to believe that what he told me isn't altogether a pipe-dream, but it sounds mightily like one.
"Sounds like a pipe-dream," commented Matt, when his chum had finished.