The word sidestrokes 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: 16
Highest Scoring Words With Friends™ Plays In The Letters sidestrokes
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Seven Letter Word Alert: (37 words)
deserts, desires, desists, dessert, diester, dieters, dossier, dresses, editors, erotise, ketoses, ketosis, kissers, reedits, resides, resists, restoke, roisted, rosiest, sisters, skirted, soirees, sortied, sorties, stereos, steroid, stokers, storied, stories, strides, strikes, stroked, strokes, tierods, tossers, tressed, tresses