The word perpetrators 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: 18
Highest Scoring Words With Friends™ Play In The Letters perpetrators
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Seven Letter Word Alert: (67 words)
apposer, operate, paperer, parrots, patters, porters, potters, praetor, praters, prepare, presort, pretape, pretest, prorate, prosper, protest, rappers, rapport, raptors, ratters, reapers, rearose, repaper, reparse, repaste, repeats, reports, reposer, rerapes, reroast, restart, restate, restore, restrap, retapes, retaste, retears, retoast, retorts, retraps, retreat, roarers, roaster, roseate, rosette, rotates, rotters, seaport, septate, serrate, spatter, spearer, spotter, starter, stepper, stopper, taperer, tappers, tapster, teapots, tearers, terrors, toaster, toppers, trapper, treater, treetop