The word masterpiece 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: 20
Highest Scoring Words With Friends™ Play In The Letters masterpiece
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Seven Letter Word Alert: (88 words)
aeriest, amerces, amperes, armpits, aseptic, campers, campier, carpets, cerates, creates, cremate, cristae, eeriest, emetics, emirate, empires, emptier, empties, epimers, escapee, escaper, icespar, impacts, imparts, meatier, meatpie, meeters, mercies, metrics, metrise, parties, pastier, pastime, peatier, permits, picrate, pierces, pirates, precast, precise, preemie, premeet, premise, primase, primate, racemes, raciest, receipt, recipes, recites, reemits, remates, remeets, repaces, repaste, repeats, respace, respect, respice, respite, restamp, retapes, reteams, retimes, scamper, scepter, sceptre, seamier, secrete, seepier, seriate, seriema, smartie, spacier, specter, spectra, spectre, spermic, spicate, stamper, steamer, steeper, tampers, teemers, tempera, tempers, traipse, triceps