The word hypostatised 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 hypostatised
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Seven Letter Word Alert: (42 words)
adipose, ashiest, atheist, dashpot, deposit, despots, dispose, dittoes, dopiest, dotiest, hoisted, isohyet, isotype, opiated, opiates, pasties, patties, pettish, pithead, posited, pothead, potties, satiety, shitpot, shotted, sophtas, spatted, spitted, spotted, stashed, taoists, teapots, teashop, theists, tiptoed, tiptoes, toadish, toasted, topside, typhads, typhoid, typists