The word unnaturalness 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 unnaturalness
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Seven Letter Word Alert: (60 words)
anneals, annuals, annular, annulet, annulus, antenna, antlers, arsenal, artless, assault, atlases, aurates, austral, auteurs, eluants, ensnarl, estrual, lantern, lunates, lusters, natural, natures, neurula, neutral, rentals, reslant, results, runnels, rustles, saltern, saluter, salutes, saunter, sealant, searats, seastar, sensual, slaters, sternal, stunner, sultana, sultans, sunstar, suntans, sutlers, sutural, sutures, taluses, tanners, tarsals, trunnel, tunnels, unalert, unalter, unearnt, unlearn, unrests, unseals, unseats, unsnarl