The word wristwatches 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
Seven Letter Word Alert: (81 words)
achiest, actress, aitches, arcwise, artiest, artists, ascites, ashiest, atheist, attires, cashers, cashews, cashier, casters, cattier, chaises, chasers, chaster, chatter, cithers, citrate, crashes, cristae, hastier, hatters, hitters, iratest, raciest, racists, rashest, ratchet, rattish, recasts, rethaws, retwist, rewatch, richest, sachets, satires, scathes, scatter, shatter, sitters, staters, statice, statics, straits, stretch, striate, swasher, swathes, swatter, swisher, tartish, tasters, tastier, theists, thirsts, threats, thwarts, tithers, trashes, trisect, tsarist, twister, waiters, wariest, washers, wasters, watcher, watches, wearish, whitest, wishers, witcher, witches, withers, witters, wraiths, wreaths, writhes