The word dermatosis 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: 14
Highest Scoring Words With Friends™ Play In The Letters dermatosis
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Seven Letter Word Alert: (55 words)
admires, aridest, astride, astroid, atomise, demasts, demists, diatoms, disarms, disrate, dossier, editors, isomers, maestro, masters, mastoid, misdate, misdoer, misdoes, misread, misseat, missort, misters, mitoses, moister, mortise, mossier, radomes, readmit, roadies, roasted, roisted, rosiest, satires, seamost, sidearm, smarted, smartie, smiters, somites, sortied, sorties, stardom, steroid, stomies, storied, stories, stormed, streams, strides, stroams, tierods, tirades, tridems, tsarism