The word uncurtained 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: 19
Highest Scoring Words With Friends™ Play In The Letters uncurtained
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Seven Letter Word Alert: (33 words)
ancient, cairned, cannier, cantred, catenin, centaur, certain, curated, curtain, detrain, entrain, inducer, intrude, natured, nuanced, reaudit, tradein, traduce, trained, tranced, turndun, unaired, uncared, uncited, uncrate, uncured, unearnt, unrated, untired, untread, untried, untuned, urinate