The word hypostatizing 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: 32
Highest Scoring Words With Friends™ Play In The Letters hypostatizing
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Seven Letter Word Alert: (37 words)
agonist, goatish, hatpins, hatting, hitting, hosting, insight, pasting, patting, phasing, phizogs, pianist, pithing, pitting, pitying, poising, posting, potting, pythons, shaping, shitpot, sitting, soaping, spaying, spiting, stating, station, staying, stygian, tapings, tasting, tinpots, tithing, tonight, yoginis, zanyish, zionist