The word daredevils 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: 17
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (50 words)
adverse, advised, advisee, adviser, aediles, deaired, dealers, dearies, deleads, deliver, delvers, derails, derides, derived, derives, desired, deviled, devisal, devised, deviser, dialers, diverse, drivels, evaders, ladders, laddies, laveers, leaders, leavers, raveled, readied, readies, realise, redeals, redials, relived, relives, resaved, resided, reveals, reviled, reviles, revised, riddles, rivaled, saddler, servile, several, sledder, veilers