The word sphacelates 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 sphacelates
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Seven Letter Word Alert: (43 words)
aspects, asphalt, atlases, capless, caplets, caseate, castles, chalets, chapels, chaplet, chelate, clashes, elapses, escapes, hapless, hatless, heeltap, lactase, latches, leaches, leashes, palaces, palates, paleate, pascals, pastels, patches, peaches, pestles, petless, placate, plashes, pleases, sachets, satchel, scathes, schleps, selects, splatch, staples, teaches, tealess, teasels