The word putrefiable 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: 22
Highest Scoring Words With Friends™ Plays In The Letters putrefiable
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Seven Letter Word Alert: (32 words)
bleater, epaulet, epurate, failure, feature, febrile, fertile, fibrate, fibulae, fibular, filbert, flareup, fleapit, friable, leafier, peatier, perlite, pleurae, prefile, prelate, puerile, rebuilt, reflate, refutal, replait, replate, repleat, reptile, tearful, treeful, triable, uralite