The word underacting 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: 20
Highest Scoring Words With Friends™ Play In The Letters underacting
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Seven Letter Word Alert: (71 words)
ancient, antigen, cairned, cannier, canting, cantred, carding, carting, catenin, centaur, certain, craning, crating, cringed, curated, curtain, dancing, darning, darting, denting, deraign, detrain, dragnet, ducting, earning, educing, entrain, gaudier, gaunted, gaunter, gentian, grained, granite, granted, grinned, grunted, guanine, inducer, ingrate, intrude, natured, nearing, nuanced, ranting, reading, reaudit, regnant, rending, renting, tangier, tearing, tending, tracing, tradein, trading, traduce, trained, tranced, trudgen, turning, unaired, uncaged, uncared, uncited, uncrate, unearnt, unrated, untired, untread, untried, urinate