The word naughtiness 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: 18
Highest Scoring Words With Friends™ Plays In The Letters naughtiness
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Seven Letter Word Alert: (39 words)
anguish, antigen, ashiest, augites, aunties, ensigns, ensuing, geishas, gentian, gnashes, guanine, guineas, hastens, heating, hunting, husting, ingests, nesting, sagiest, sashing, seating, seitans, sensing, sestina, shutins, siennas, signets, sinuate, sunhats, sunnies, suntans, sustain, teasing, tensing, tunings, unhinge, unseats, unstage, unstain