The word inexorability 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: 27
Highest Scoring Words With Friends™ Play In The Letters inexorability
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Seven Letter Word Alert: (47 words)
ability, aileron, airline, anxiety, axinite, bairnly, baloney, baronet, bayonet, bilayer, biliary, biolite, blarney, bloater, byliner, elation, exilian, inertia, inertly, initial, inlayer, irately, latrine, libator, liberty, lintier, niobate, niobite, notable, notably, orbital, otarine, oxbiter, ratline, reality, relaxin, reliant, retinal, retinol, tearily, tenably, toenail, trenail, triable, triaxle, triaxon, trilobe