The word unfeelingness 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™ Plays In The Letters unfeelingness
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Seven Letter Word Alert: (32 words)
elegies, elegise, engines, engulfs, ensigns, ensuing, feeling, feesing, felines, fennels, finesse, finless, fleeing, flenses, fueling, funnels, funnies, fussing, geneses, genesis, genuine, genuses, gunless, infuses, lensing, selfies, sensing, signees, singles, sunnies, sunning, unsling