The word keratinising 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: 20
Highest Scoring Words With Friends™ Plays In The Letters keratinising
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Seven Letter Word Alert: (84 words)
aigrets, airiest, airings, antigen, antsier, argents, arising, asinine, earning, entrain, erasing, gainers, gaiters, garnets, gastrin, gentian, granite, igniter, ignites, inertia, ingrain, ingrate, inkiest, insaner, intakes, interns, irisate, kainite, karites, keratin, kerning, kinesin, nastier, nearing, nesting, raining, raising, rankest, ranking, ranting, ratings, reaking, regains, regnant, reining, reknits, renting, restain, resting, retains, retinas, rinking, rinsing, risking, searing, seating, sinkage, sinking, skating, skinner, snakier, snaking, snaring, stagier, stainer, staking, staring, stinger, stinker, strange, takings, tangier, tankers, tanking, tanners, tasking, tearing, teasing, tensing, tiering, tinkers, tinners, tinnier, triages