The word referential 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: 16
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (45 words)
alerter, arenite, earlier, enteral, enterer, eternal, fainter, ferrite, fertile, fireant, fleeter, flirter, frailer, inerter, inflate, latrine, leafier, learner, leerier, lineate, ratline, realter, reefier, reenter, refiner, reflate, refrain, reinter, relater, relearn, reliant, retinal, retiree, retrain, retrial, tearier, teenier, terrain, terrane, trailer, trainee, trainer, trenail, triaene, trifler