The word misfeasance 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: 21
Highest Scoring Words With Friends™ Play In The Letters misfeasance
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Seven Letter Word Alert: (23 words)
amnesia, amnesic, anaemic, caseins, cinemas, encases, famines, fancies, fascias, fascism, fiancee, fiances, finesse, icemans, icemass, inseams, maniacs, meanies, menaces, nemesis, seances, siamese, siemens