The word syndactylies 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: 22
Highest Scoring Words With Friends™ Play In The Letters syndactylies
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Seven Letter Word Alert: (92 words)
acetyls, aidless, ascends, ascents, ascites, candies, candles, cantles, caseins, castile, castled, castles, citadel, cladist, classed, clients, cyanide, cyanids, cyanise, cyanite, cystine, dacites, dactyls, dactyly, dayless, decalin, decants, declass, delicts, delints, delists, deltaic, denials, density, dentals, dentils, desalts, descant, desilts, destain, destiny, details, detains, dialect, dialyse, dilates, discant, discase, dissect, dissent, distyle, diynals, dynasty, ecstasy, elastic, elastin, encysts, enlists, entails, incased, incests, insects, instead, instyle, islands, laciest, lancets, latency, listens, lysates, nailset, nastily, sainted, saintly, salient, salines, scantly, secants, seitans, sestina, silanes, silents, slanted, snailed, snidely, snidest, stained, stances, stencil, stylise, syndics, tinsels