The word disheveling 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: 22
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (30 words)
deleing, delving, deveins, dingies, dishing, divines, divings, eleidin, eliding, endives, english, heeding, heeling, hidings, hindleg, inveigh, legends, linseed, livened, livings, neighed, seeding, shelved, shindig, shingle, sidling, sieving, singled, sliding, veiling