The word decameters 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 decameters
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Seven Letter Word Alert: (44 words)
amerced, amerces, catered, cerates, creamed, creased, created, creates, cremate, crested, dearest, decamer, decares, decease, decrees, demates, emersed, erected, meeters, metered, racemed, racemes, reacted, readmes, reasted, recedes, redacts, redates, redeems, reested, remated, remates, remeets, reteams, seceder, secrete, sedater, smarted, smeared, steamed, steamer, steered, tasered, teemers