The word unmeritorious 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: 19
Highest Scoring Words With Friends™ Plays In The Letters unmeritorious
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Seven Letter Word Alert: (86 words)
emotion, erosion, inosite, insurer, interim, ioniser, ionomer, ironers, ironies, mentors, meronts, minters, mintier, minuets, minuter, minutes, mistier, mistune, misturn, moisten, moister, monitor, monster, mortise, motions, mounter, mountie, mourner, mousier, munites, mustier, nitrous, noisier, noisome, norites, nostrum, nurture, nutsier, ominous, onerous, orients, outruns, remints, remount, reroots, retours, retrims, returns, rioters, riotous, roister, roomers, roomier, rooster, rooters, rostrum, routers, routine, ruinous, rumours, runtier, runtime, rustier, snorter, sootier, sternum, stonier, stourie, sunroom, tenuous, termini, tonsure, toonies, torsion, tourers, tourism, tremors, trimers, triones, trouser, tumours, turners, uniters, unities, untruer, urosome