The word screwdrivers 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: 23
Highest Scoring Words With Friends™ Play In The Letters screwdrivers
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Seven Letter Word Alert: (40 words)
cerises, cervids, decrews, decrier, decries, deicers, deriver, derives, derries, desirer, desires, devices, deviser, devises, dewires, diverse, dresser, drivers, redress, redries, redrive, resider, resides, reviews, revised, reviser, revises, rewired, rewires, rivered, screeds, screwed, screwer, servers, service, swerved, swerver, swerves, viewers, weirder