The word unpleasantness 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: 22
Highest Scoring Words With Friends™ Play In The Letters unpleasantness
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Seven Letter Word Alert: (75 words)
alpeens, anapest, anneals, annuals, annulet, antenna, aptness, asepses, assault, assents, atlases, auletes, elapses, eluants, eluates, eluents, enseals, epaulet, eupneas, lateens, leanest, lessens, lunates, napless, neatens, nestles, netless, paenula, palates, paleate, pastels, peanuts, peasant, pennant, pentane, penults, pestles, petless, planeta, planets, plateau, pleases, plusses, pulsate, punless, saltpan, salutes, sapless, sateens, sealant, senates, sensate, sensual, spatula, spelean, spleens, staples, sultana, sultans, sunless, sunsets, suntans, taluses, tassels, tealess, teasels, tunnels, tussles, uneaten, unseals, unseats, unsnaps, unspent, upslant, useless