The word hypostatisation 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: 23
Highest Scoring Words With Friends™ Play In The Letters hypostatisation
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Seven Letter Word Alert: (35 words)
aphonia, atonias, attains, hatpins, hotpots, hotspot, isospin, notists, options, passion, patinas, photons, pianist, pistons, poisons, potions, potshot, pottant, pythons, shitpot, siphons, sonatas, sophtas, statins, station, statist, stonish, syphons, taoists, tattoos, tinpots, tosspot, toyshop, typhoon, typists