The word squanderers 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™ Plays In The Letters squanderers
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Seven Letter Word Alert: (31 words)
assured, asunder, darners, dresser, earners, endears, endures, ensears, ensured, ensurer, ensures, erasers, erasure, errands, nursers, readers, redness, redress, renders, rereads, resands, resends, sanders, senders, snarers, squared, squarer, squares, sundaes, undress, ureases