The word landscaper is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 19
Highest Scoring Words With Friends™ Play In The Letters landscaper
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Seven Letter Word Alert: (38 words)
adrenal, arcades, arsenal, caldera, canapes, canards, candela, candler, candles, carpals, carpels, clasped, clasper, cradles, dancers, enclasp, enlards, lancers, landers, palaces, panders, parades, parcels, placard, placers, planers, pranced, prances, reclads, reclasp, replans, scalped, scalper, scandal, scarped, scraped, slander, snarled