The word debilitates 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: (41 words)
abetted, aediles, albites, alibies, astilbe, baldest, batlets, battled, battles, belated, betides, betitle, blasted, bleated, dailies, debates, deities, delates, deltate, details, dieties, dietist, dilates, disable, ditties, edibles, elitist, latites, liaised, libated, libates, settled, sidelit, slatted, slitted, stabled, stilted, tablets, testbed, tidbits, tidiest