The word cytoskeletons 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: 24
Highest Scoring Words With Friends™ Play In The Letters cytoskeletons
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Seven Letter Word Alert: (61 words)
cenotes, closest, closets, console, contest, coolest, cottons, cottony, cotyles, coyness, coyotes, cytosol, enclose, encysts, enlocks, enocyte, enstyle, ketones, ketoses, kettles, keyless, keynote, keysets, keyslot, lockets, lockset, loosens, loosest, neocyte, nestles, netless, nettles, ocelots, octenes, octynes, oocysts, oocytes, osselet, osteons, otocyst, selects, settles, slocken, sockets, sockeye, soonest, stenose, stetson, stylets, systole, teleost, telnets, tensely, tensest, toeless, toolset, tootles, toyless, tycoons, tyloses, tylotes