This puzzles was originally posted on the NY Times games forum
Bonus parapgraph:As far as the number of words in the top row, I asked a WRITER friend to put down her PUTTER and PRETTY PYRITE POTTERY, and gave her the PROPERTY of the poser. Never a QUITTER (but a darn good TIPPER), she gave me several words the REQUIRE only letters from the top row, and asked me to RETYPE them here. Her OUTPUT: several TIP-TOP answers including WETTER and PURITY.
(All-cap words consist solely of letters in the home row.)
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