The word turnstiles 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: 13
Highest Scoring Words With Friends™ Play In The Letters turnstiles
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Seven Letter Word Alert: (40 words)
enlists, entrust, inserts, insults, insures, intrust, listens, litters, luniest, lusters, lustier, lutists, lutites, nutlets, nutsier, nutters, nuttier, relists, results, retilts, retints, rustles, rutiles, silents, sinters, sitters, slitter, stilter, stunter, suiters, sunrise, sutlers, tilters, tinsels, tinters, turtles, uniters, unlists, unrests, utensil