The word unclassified 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 unclassified
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Seven Letter Word Alert: (71 words)
aedilic, aidless, anilide, ascends, candies, candles, caseful, caseins, cauline, celsius, classed, clauses, cuisine, dailies, daisies, decalin, declass, denials, discase, dualise, dulcian, fadeins, fancied, fancies, felsics, fiances, fiducia, finales, finials, finless, fissile, fluidic, fusidic, iciness, incased, incised, incises, include, indices, induces, infidel, infield, infused, infuses, insides, inulase, islands, laicise, liaised, liaises, nuclide, salines, sensual, silanes, silicas, sluiced, sluices, snafued, snailed, suicide, sulfide, sundaes, sundial, uncased, unclads, unideal, unified, unifies, unlaced, unlaces, unseals