The word contaminates 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 contaminates
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Seven Letter Word Alert: (71 words)
aconite, actants, actions, amentia, amnesia, amnesic, amnions, anaemic, ancient, animate, animose, anoints, atomics, atomise, atonias, atonics, attains, caeomas, canines, cantons, catenin, cations, catmint, cinemas, coatman, consent, contain, content, contest, costate, icemans, incants, incomes, inmates, instant, instate, intents, intones, maniacs, mansion, masonic, mention, mittens, moisten, montane, nascent, nations, nematic, nictate, nonmate, nonmeat, notices, octanes, octants, satanic, satiate, scatoma, section, smitten, somatic, stamina, stannic, statice, station, stomata, stomate, tannest, tenants, tension, tetanic, tomcats