The word overappraisal 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: 24
Highest Scoring Words With Friends™ Plays In The Letters overappraisal
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Seven Letter Word Alert: (52 words)
aerials, aplasia, apparel, appeals, appears, applier, applies, apposer, apprise, approve, areolar, areolas, arrival, arrives, aspirer, averral, loppers, lorries, ovaries, overlap, palaver, parasol, parlors, paroles, plosive, plovers, poplars, praiser, prevail, propels, prosper, provers, rappels, rappers, raspier, reavail, repairs, rippers, rippler, ripples, sappier, savorer, serovar, slipper, soapier, sopaipa, soppier, spiraea, spoiler, vaporer, variola, velaria