The word perpetrating 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 perpetrating
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Seven Letter Word Alert: (75 words)
angrier, arenite, attirer, earring, entreat, grainer, granite, grantee, granter, greaten, greater, gripper, gritter, inepter, inerter, ingrate, integer, iterate, nattier, nitrate, painter, paperer, parting, partner, patient, pattern, patting, peatier, peeping, peering, pertain, pettier, petting, pipette, prating, prepare, pretape, printer, rangier, rapping, rattier, ratting, reagent, reaping, rearing, regrant, regrate, reigner, reinter, repaint, repaper, repiner, reprint, retrain, retreat, tangier, taperer, tapping, tarring, tearier, tearing, tentage, tentier, ternate, terpine, terrain, terrane, trainee, trainer, trapper, treater, treeing, triaene, tripper, triptan