The word reinvigorate 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: 19
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (69 words)
angrier, arenite, avenger, averter, earring, engrave, etaerio, eviting, grainer, granite, grantee, granter, greaten, greater, griever, groaner, igniter, ignitor, inerter, inertia, ingrate, integer, invitee, inviter, invitro, ironage, nervier, oranger, orating, ornater, otarine, overage, overate, overeat, overran, rainier, rangier, reagent, rearing, reaving, reeving, regrant, regrate, reigner, reinter, retrain, rioting, riveter, roaring, tangier, tarring, tearier, tearing, terrain, terrane, tiering, trainee, trainer, treeing, triaene, vearing, veering, veinier, vertigo, veteran, vetoing, vinegar, vintage, vitrine