The word wainscoted 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: 18
Highest Scoring Words With Friends™ Play In The Letters wainscoted
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Seven Letter Word Alert: (30 words)
acnodes, aconite, actions, adonise, anodise, atonics, candies, cations, coasted, coedits, dacites, deacons, decants, descant, destain, detains, discant, donates, incased, instead, noticed, notices, octanes, sainted, section, sitdown, stained, tacnode, twonies, waisted