The word dishonesties 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: 16
Highest Scoring Words With Friends™ Play In The Letters dishonesties
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Seven Letter Word Alert: (36 words)
deities, denoise, denotes, densest, desists, destine, dieties, dietine, dissent, edition, heisted, hessite, hissies, histone, hoisted, hostess, hotness, indites, inosite, insides, insists, iodines, iodises, iodites, ionised, ionises, nosiest, osseins, seitens, session, sestine, sinoids, snidest, stenose, stonish, thiones