The word treadwheels 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™ Plays In The Letters treadwheels
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Seven Letter Word Alert: (90 words)
adheres, alerted, altered, ashweed, dealers, dearest, dearths, deerlet, delates, deleter, deletes, dewater, earthed, elaters, halters, hardest, hatreds, headers, headset, healder, healers, hearsed, hearted, heaters, heralds, lathers, leaders, leadeth, leashed, leather, leeward, lewdest, realest, reasted, redates, redeals, redealt, reested, reheats, reheels, related, relates, release, resawed, resewed, rethaws, rewelds, seaweed, sedater, seethed, seether, sheared, sheered, sheeted, sheeter, shelter, slather, sleeted, stealer, steeled, steered, steward, strawed, strewed, swathed, sweated, sweater, sweeter, swelter, tarweed, tasered, threads, trashed, trawled, treadle, tweedle, watered, weather, weeders, welders, whalers, wheedle, wheeled, wheeler, whereas, whereat, wreathe, wreaths, wrested, wrestle