The word ghostwriting 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: 22
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (30 words)
growing, growths, hitting, horsing, hosting, ignitor, insight, intorts, intwist, nitwits, origins, ringgit, rioting, rotting, shoring, showing, sighing, sitting, sorting, storing, stowing, throngs, tigrish, tithing, tonight, whiting, wirings, wishing, witting, writing