The word penuriously 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: 20
Highest Scoring Words With Friends™ Plays In The Letters penuriously
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Seven Letter Word Alert: (26 words)
elusion, elusory, epsilon, leprosy, leprous, lineups, lousier, lupines, piously, pleions, proline, pronely, purines, purlins, purloin, pylorus, pyrones, ruinous, soupier, spinule, spoiler, sporule, unipole, uprisen, uprouse, upsilon