The word unceremonious 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: 23
Highest Scoring Words With Friends™ Play In The Letters unceremonious
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Seven Letter Word Alert: (48 words)
censure, ceriums, cerumen, coiners, consume, crimson, cronies, cumenes, curious, curiums, encores, erosion, incense, incomer, incomes, ionomer, ionones, isomere, mercies, microns, mincers, miocene, moronic, mousier, muscone, necrose, neurons, noisome, nominee, nonuser, numeric, omicron, ominous, onerous, recoins, remines, reunion, ruesome, ruinous, sincere, someone, sunnier, sunroom, uncrime, uncurse, unicorn, unrisen, urosome