The word windscreens 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 windscreens
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Seven Letter Word Alert: (33 words)
censers, cerises, cinders, decrews, decries, deicers, deniers, desires, dewires, dinners, discern, incense, newness, newsier, redness, rescind, resends, resides, rewinds, screeds, screens, screwed, secerns, senders, sincere, sinewed, sinners, weiners, widener, wieners, wincers, winders, winners