The word devitrifies 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: 19
Highest Scoring Words With Friends™ Play In The Letters devitrifies
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Seven Letter Word Alert: (30 words)
defiers, deifier, deifies, deities, derives, deviser, diester, dieters, dieties, dirties, ditsier, diverse, diverts, edifier, edifies, festive, iridise, reedits, reified, reifies, restive, revised, revisit, riveted, sievert, stivier, strived, tidiers, trifids, visited