The word deconstruct 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: 20
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (57 words)
concert, concurs, conduce, conduct, contest, cornets, cornett, cotters, counted, counter, coursed, courted, crudest, crunode, crusted, cutters, decocts, decrust, detorts, detours, dotters, ductors, eductor, encrust, entrust, nutters, occuder, recount, reducts, resound, rodents, rotunds, sconced, scorned, scoured, scouted, scouter, snorted, snotted, snotter, snouted, sounder, sourced, stouter, student, stunted, stunter, teutons, tonsure, touters, trounce, trusted, tutored, uncords, uncored, undoers, undrest