The word dematerialized 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: 29
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (66 words)
admiral, admired, aerated, airdate, airmail, airtime, alarmed, alerted, alidade, altered, azimide, deaired, dealate, deerlet, delated, deleted, deleter, delimed, delimit, deliria, demated, demerit, diazide, dilated, dilater, dimeter, dirtied, ditzier, dreamed, emailed, emerald, emirate, itemize, limeade, limited, limiter, maleate, maltier, marital, marlite, martial, mealier, meatier, meddler, mediate, merited, metaled, metered, metrize, militar, mitered, radiate, readied, readmit, realize, redated, redealt, related, remated, retiled, retimed, tiaraed, timider, trailed, treaded, treadle