The word salesclerks 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™ Plays In The Letters salesclerks
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Seven Letter Word Alert: (26 words)
callers, carless, cellars, cereals, classes, creases, cresses, earless, leakers, leasers, recalls, reclass, relaces, resales, rescale, reseals, resells, sackers, sacless, scalers, sclerae, scleral, scleras, sealers, sellers, slacker