The word reiteration 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: 12
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (30 words)
arenite, attirer, entreat, etaerio, inerter, inertia, iterate, nattier, nitrate, nitrite, nittier, ornater, otarine, rainier, rattier, reinter, retrain, retreat, tearier, tentier, ternate, terrain, terrane, tintier, torrent, trainee, trainer, traitor, treater, triaene