The word woolgathers 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: 19
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (40 words)
aerosol, earshot, galoots, gaolers, gasohol, gathers, gelatos, gloater, glowers, growths, haglets, halters, harlots, hogwort, holster, hostler, howlers, largest, lathers, loather, loathes, looters, rathole, reglows, regosol, reshoot, rethaws, retools, roseola, shooter, slather, soother, storage, stowage, toolers, towages, trowels, warthog, whalers, wreaths