The word curmudgeons 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: 23
Highest Scoring Words With Friends™ Play In The Letters curmudgeons
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Seven Letter Word Alert: (31 words)
codgers, consume, coursed, crunode, decorum, gourdes, grounds, groused, guerdon, moderns, mongers, morgues, mourned, mungers, muscone, remound, resound, scorned, scoured, scourge, scrouge, smudger, sounder, sourced, surgeon, uncords, uncored, uncured, uncurse, undergo, undoers