The word misidentifying 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: 27
Highest Scoring Words With Friends™ Play In The Letters misidentifying
:
Seven Letter Word Alert: (50 words)
defying, densify, density, denting, dentins, denying, destiny, dieting, dignify, dignity, diimine, dingies, dinting, dyeings, dyneins, editing, endings, fending, fidgets, fidgety, figment, finding, finings, ignited, ignites, imidine, indents, indites, intends, mending, midgets, minding, mindset, minting, misedit, misting, nesting, sending, sifting, signify, smidgen, smidgin, smiting, stimied, stymied, tending, tensing, tidings, tidying, timings