The word uncontaminated 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: 25
Highest Scoring Words With Friends™ Play In The Letters uncontaminated
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Seven Letter Word Alert: (79 words)
aconite, actuate, acuated, adenoma, amentia, amidone, anaemic, ancient, andante, animate, antacid, antenna, attuned, auction, automat, catenin, catmint, caudate, caution, coadmit, coatman, codetta, condemn, conduit, contain, contend, content, counted, decuman, demonic, demotic, demount, dictate, domatia, domatic, eudicot, intoned, inuendo, mandate, mention, montane, mounted, mountie, mundane, munited, mutated, nautica, nematic, nictate, nomadic, nonacid, noncute, nondate, nondiet, nonmate, nonmeat, nonmute, notated, noticed, nuanced, nutmeat, omitted, outdate, outmate, tacnode, tainted, taunted, tetanic, timeout, unaimed, uncited, unction, unmated, unmeant, unmined, unnamed, unnoted, untamed, untimed