The word devitrifying 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 devitrifying
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Seven Letter Word Alert: (27 words)
defying, dieting, dignify, dignity, dingier, diviner, drivein, driving, editing, eviting, fidgety, fringed, ignited, igniter, inditer, invited, inviter, niftier, nitride, nitrify, retying, rifting, tidying, tiering, tindery, vitrify, vitrine