The word keratinizing 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™ Play In The Letters keratinizing
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Seven Letter Word Alert: (33 words)
antigen, earning, entrain, gentian, granite, igniter, inertia, ingrain, ingrate, kainite, keratin, kerning, nearing, raining, ranking, ranting, reaking, regnant, reining, renting, rinking, tangier, tanking, tearing, teazing, tiering, tinnier, zingani, zingare, zingari, zingier, zinkier, zinking