The word monstrosities 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: 17
Highest Scoring Words With Friends™ Plays In The Letters monstrosities
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Seven Letter Word Alert: (88 words)
emotion, erosion, inosite, inserts, insists, interim, intorts, ioniser, ionises, ionomer, ironies, isomers, meiosis, mentors, meronts, metrist, minters, mintier, mission, missort, misters, mistier, mitiest, mitoses, mitosis, mittens, moisten, moister, monitor, monster, mortise, mossier, motions, mottoes, nitrite, nittier, noisier, noisome, noosers, norites, nosiest, notists, omitter, orients, osmosis, osseins, osteons, remints, resists, retints, risotto, rosiest, seniors, sensors, sermons, session, sinters, sissier, sisters, sitters, smiters, smitten, snotter, somites, somonis, sooners, soonest, sootier, sorties, stetson, stimies, stomies, stoners, stonier, stories, tensors, termini, tiniest, tinters, tintier, toonies, tooters, tootsie, torment, tornote, torsion, tossers, triones