The word nonmetallic 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: 21
Highest Scoring Words With Friends™ Play In The Letters nonmetallic
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Seven Letter Word Alert: (37 words)
aconite, ailment, aliment, alltime, aloetic, ancient, antlion, calomel, cannoli, catenin, climate, coalite, coalmen, collate, contain, elation, lactone, lanolin, lection, lineman, melanin, mention, metical, micella, montane, nematic, netmail, nominal, nonlate, nonmail, nonmale, nonmate, nonmeal, nonmeat, toenail, tollman, tollmen