The word reintegrate 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: 14
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (54 words)
angrier, arenite, attirer, eagerer, earring, enterer, entreat, grainer, granite, grantee, granter, greaten, greater, greener, greeter, gritter, inerter, ingrate, integer, iterate, nattier, nitrate, rangier, rattier, ratting, reagent, rearing, reenter, regrant, regrate, regreen, regreet, reigner, reinter, reneger, retiree, retrain, retreat, tangier, tarring, tearier, tearing, teenage, teenier, tentage, tentier, ternate, terrain, terrane, trainee, trainer, treater, treeing, triaene