The word heterodoxies 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™ Play In The Letters heterodoxies
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Seven Letter Word Alert: (47 words)
dehorts, detoxes, diester, dieters, diether, disroot, dithers, editors, eeriest, erotise, exerted, exhorts, existed, heisted, heroise, heteros, hoisted, hotrods, osteoid, oxherds, oxhides, reedits, reested, rehides, reshoed, reshoot, roisted, roosted, seedier, seethed, seether, sheered, sheeted, sheeter, shirted, shooter, shorted, soothed, soother, sootier, sortied, steered, steroid, storied, tierods, toroids, toxoids