The word reverential 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: 17
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (46 words)
alerter, arenite, averter, earlier, elative, elevate, enteral, enterer, eternal, inerter, latrine, learner, leerier, lineate, nervier, ratline, realter, reenter, reinter, relater, relearn, reliant, relieve, renerve, retinal, retiree, retrain, retrial, reveler, reverie, reviler, riveter, tearier, teenier, terrain, terrane, trailer, trainee, trainer, trenail, triaene, veinlet, veneral, ventral, veteran, vinelet