The word inheritable 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: 18
Highest Scoring Words With Friends™ Plays In The Letters inheritable
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Seven Letter Word Alert: (38 words)
airline, arenite, beneath, benthal, blather, bleater, blether, blither, breathe, earthen, enabler, enteral, enthral, eternal, hairnet, hearten, herblet, hernial, inertia, inhabit, inhaler, inherit, latrine, leather, lineate, lintier, neither, ratline, rebathe, reblent, reliant, retinal, tenable, therein, trainee, trenail, triable, triaene