The word terrorisation 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: 14
Highest Scoring Words With Friends™ Plays In The Letters terrorisation
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Seven Letter Word Alert: (92 words)
airiest, antsier, artiest, artsier, atoners, attirer, attires, erosion, errants, inertia, inosite, instate, intorts, ioniser, iratest, irisate, ironers, ironies, nastier, natters, nattier, nitrate, nitrite, nittier, noisier, norites, notator, oration, orators, orients, ornater, otarine, rainier, ranters, rations, ratters, rattier, rattons, rattoon, reroast, reroots, restain, restart, retains, retinas, retints, retoast, retorts, retrain, rioters, risotto, roarers, roaster, roister, rooster, rooters, rotates, rotator, rotters, senator, snorter, snotter, sootier, sorrier, stainer, starter, station, stirrer, stonier, straint, striate, tarrier, tarries, tastier, terrain, terroir, terrors, tiniest, tinters, tintier, toaster, toonies, tooters, tootsie, tornote, torrent, torsion, trainer, traitor, transit, treason, triones