The word demineralized 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™ Plays In The Letters demineralized
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Seven Letter Word Alert: (46 words)
admired, airline, amended, amender, anilide, azimide, dandier, dandler, deadmen, deaired, delimed, deliria, denarii, diamine, diazene, diazide, diazine, drained, dreamed, eleidin, emailed, emendal, emended, emender, emerald, learned, limeade, mandrel, mandril, manlier, mealier, meander, meddler, midland, midline, mineral, needier, needled, needler, readied, realize, reamend, redline, relined, remined, renamed