The word decontaminated 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: 24
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (79 words)
academe, acetate, acetone, aconite, adenine, adenoid, adenoma, amended, amentia, amidone, anaemic, ancient, andante, anemone, animate, antacid, candied, canteen, catenin, catmint, coadmit, coatman, codeine, codetta, condemn, contain, contend, content, deadman, deadmen, demated, demonic, demoted, demotic, denoted, dentate, dentine, diamond, dictate, dittoed, domatia, domatic, donated, emanate, eminent, emitted, enacted, enamine, encoded, endemic, endnote, enticed, intoned, manatee, mandate, matinee, mediate, menaced, mention, miocene, montane, nematic, neonate, nictate, nomadic, nominee, nonacid, nondate, nondiet, nonmate, nonmeat, notated, noticed, omitted, onetime, tacnode, tainted, teatime, tetanic