The word stonewashing 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: 21
Highest Scoring Words With Friends™ Play In The Letters stonewashing
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Seven Letter Word Alert: (73 words)
agonies, agonise, agonist, anoints, antigen, ashiest, atoning, awnings, egoists, ensigns, geishas, gentian, gnashes, goatish, hastens, heating, histone, hoagies, hogties, hosting, hotness, ingests, intones, nations, nesting, newtons, noseans, nosiest, nothing, onstage, sagiest, sashing, seahogs, seating, seitans, sensing, sestina, sewings, shewing, shoeing, showing, siennas, signets, snowing, sonnets, stewing, stogies, stoning, stonish, stowage, stowing, swathes, teasing, tensing, tension, thawing, thiones, tonnage, tossing, towages, twinges, twonies, wanting, wantons, washing, wasting, weaning, weights, whinges, whitens, wigeons, witness, wonting