The word mismanagement is playable in Words With Friends™, but 1 blank substituting for the letter 'm' is 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™ Plays In The Letters mismanagement
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Seven Letter Word Alert: (52 words)
against, agamete, agatine, agatise, amentia, ammines, amnesia, anginas, animate, antigen, emanate, eminent, enamine, engines, enigmas, gametes, gamiest, gateman, gatemen, gentian, immense, inmates, intense, magenta, magnate, magnets, manages, manatee, matinee, matings, meanest, meanies, meaning, meeting, menages, mintage, mismate, misname, nametag, neatens, negates, nesting, seaming, seating, seeming, segment, sigmate, stamina, teaming, teasing, teeming, tensing