The word malefactors 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 malefactors
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Seven Letter Word Alert: (58 words)
acaters, alecost, areolas, armlets, caeomas, calmest, cameras, carafes, caramel, cartels, clamors, clarets, coalers, coaltar, coastal, coaster, colters, escolar, factors, faecals, falcate, falters, farmost, femoral, flamers, floater, florets, flotsam, foamers, folates, formals, formats, fractal, lactase, lactose, loafers, locates, maestro, maltose, morales, mortals, oatmeal, octamer, oracles, recoals, recoats, refloat, rosacea, sarcoma, scarlet, scatoma, scrotal, selfact, solacer, stromal, tamales, tarmacs, tramels