The word outstaring 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: 14
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (42 words)
agonist, agoutis, airguns, gastrin, guitars, intorts, intrust, nitrous, orating, ousting, outgain, outgrin, outings, outrant, outsang, ragouts, rainout, ratings, rations, ratting, rattons, rotting, rousing, routing, rusting, rutting, signora, soaring, sorting, souring, staring, stating, station, storing, straint, tasting, tauting, touring, tourist, touting, transit, truants