The word keratinised 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: 17
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (98 words)
aeriest, airiest, airside, aniseed, antsier, arenite, aridest, astride, dairies, dankest, darkens, darkest, dearest, dearies, deities, denarii, deniers, destain, destine, detains, detrain, diaries, diarist, diesink, diester, dieters, dieties, dietine, dinkier, dinkies, dirties, disrank, disrate, ditsier, earnest, eastern, endears, entries, inditer, indites, inertia, inkiest, insider, instead, intakes, irisate, kainite, karites, keratin, kernite, kindest, kneader, nastier, nearest, nitride, rankest, readies, reasked, reasted, redates, reedits, reinked, reknits, restain, restake, retains, retaken, retakes, retinas, sainted, sandier, sardine, sedater, seriate, skirted, snakier, snarked, sneaked, sneaker, stained, stainer, standee, stander, sterane, sterned, stinker, tankers, tasered, tenders, tidiers, tinders, tinkers, tirades, tradein, trained, trainee, triaene, trienes